CVE-2026-27606

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Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker to control output filenames (e.g., via CLI named inputs, manual chunk aliases, or malicious plugins) and use traversal sequences (`../`) to overwrite files anywhere on the host filesystem that the build process has permissions for. This can lead to persistent Remote Code Execution (RCE) by overwriting critical system or user configuration files. 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Insecure file name sanitization in the core engine allows an attacker to control output filenames, potentially through command-line interface (CLI) inputs, manual chunk aliases, or malicious plugins. By using directory traversal sequences (`../`), an attacker can overwrite files anywhere on the host filesystem where the build process has write permissions. 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This vulnerability can lead to persistent remote code execution (RCE) by overwriting critical system or user configuration files."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-22", "description": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}], "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-09-10T12:05:04.070Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-27606", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-02-25T20:09:59.552224Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-25T20:10:18.661Z"}}], "cna": {"title": "Rollup 4 has Arbitrary File Write via Path Traversal", "source": {"advisory": "GHSA-mw96-cpmx-2vgc", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "rollup", "product": "rollup", "versions": [{"status": "affected", "version": "< 2.80.0"}, {"status": "affected", "version": ">= 3.0.0, < 3.30.0"}, {"status": "affected", "version": ">= 4.0.0, < 4.59.0"}]}], "references": [{"url": "https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc", "name": "https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2", "name": "https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e", "name": "https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3", "name": "https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/rollup/rollup/releases/tag/v2.80.0", "name": "https://github.com/rollup/rollup/releases/tag/v2.80.0", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/rollup/rollup/releases/tag/v3.30.0", "name": "https://github.com/rollup/rollup/releases/tag/v3.30.0", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/rollup/rollup/releases/tag/v4.59.0", "name": "https://github.com/rollup/rollup/releases/tag/v4.59.0", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "Rollup is a module bundler for JavaScript. 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Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker to control output filenames (e.g., via CLI named inputs, manual chunk aliases, or malicious plugins) and use traversal sequences (`../`) to overwrite files anywhere on the host filesystem that the build process has permissions for. This can lead to persistent Remote Code Execution (RCE) by overwriting critical system or user configuration files. Versions 2.80.0, 3.30.0, and 4.59.0 contain a patch for the issue."}, {"lang": "es", "value": "Rollup es un empaquetador de m\u00f3dulos para JavaScript. Las versiones anteriores a la 2.80.0, 3.30.0 y 4.59.0 del empaquetador de m\u00f3dulos Rollup (espec\u00edficamente v4.x y presente en el c\u00f3digo fuente actual) es vulnerable a una escritura de archivo arbitraria mediante salto de ruta. La sanitizaci\u00f3n insegura de nombres de archivo en el motor principal permite a un atacante controlar los nombres de archivo de salida (por ejemplo, mediante entradas con nombre de CLI, alias de fragmentos manuales o plugins maliciosos) y usar secuencias de salto ('../') para sobrescribir archivos en cualquier lugar del sistema de archivos del host para el que el proceso de compilaci\u00f3n tenga permisos. Esto puede conducir a una ejecuci\u00f3n remota de c\u00f3digo (RCE) persistente al sobrescribir archivos de configuraci\u00f3n cr\u00edticos del sistema o del usuario. Las versiones 2.80.0, 3.30.0 y 4.59.0 contienen un parche para el problema."}], "id": "CVE-2026-27606", "lastModified": "2026-09-10T13:18:01.097", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": 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"modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-27606", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-25T20:09:59.552224Z", "version": "2.0.3"}}]}, "published": "2026-02-25T03:16:04.603", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://github.com/rollup/rollup/releases/tag/v2.80.0"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://github.com/rollup/rollup/releases/tag/v3.30.0"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://github.com/rollup/rollup/releases/tag/v4.59.0"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:10175"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:13508"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:13512"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:13545"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:5132"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:5649"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:5665"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:6174"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:6802"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:8483"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-27606"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442530"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27606.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-22"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "rollup: Rollup: Remote Code Execution via Path Traversal Vulnerability", "id": "2442530", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442530"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-22", "details": ["A flaw was found in Rollup, a JavaScript module bundler. Insecure file name sanitization in the core engine allows an attacker to control output filenames, potentially through command-line interface (CLI) inputs, manual chunk aliases, or malicious plugins. By using directory traversal sequences (`../`), an attacker can overwrite files anywhere on the host filesystem where the build process has write permissions. This vulnerability can lead to persistent remote code execution (RCE) by overwriting critical system or user configuration files."], "name": "CVE-2026-27606", "package_state": [{"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Affected", "package_name": "openshift-pipelines/pipelines-hub-api-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Affected", "package_name": "openshift-pipelines/pipelines-hub-db-migration-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Affected", "package_name": "openshift-pipelines/pipelines-hub-ui-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-hub-ui-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:service_mesh:2", "fix_state": "Affected", "package_name": "openshift-service-mesh/kiali-rhel8", "product_name": "OpenShift Service Mesh 2"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Not affected", "package_name": "openshift-service-mesh/kiali-operator-bundle", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Not affected", "package_name": "openshift-service-mesh/kiali-rhel9", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Not affected", "package_name": "openshift-service-mesh/kiali-rhel9-operator", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Not affected", "package_name": "advanced-cluster-security/rhacs-main-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:amq_broker:7", "fix_state": "Affected", "package_name": "org.jolokia-jolokia-parent", "product_name": "Red Hat AMQ Broker 7"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Not affected", "package_name": "ansible-automation-platform-24/lightspeed-rhel8", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Not affected", "package_name": "ansible-automation-platform-25/lightspeed-rhel8", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Affected", "package_name": "ansible-automation-platform-26/gateway-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Not affected", "package_name": "ansible-automation-platform-26/lightspeed-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Affected", "package_name": "ansible-on-clouds/aoc-azure-aap-installer-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Not affected", "package_name": "automation-controller", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Affected", "package_name": "automation-eda-controller", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Affected", "package_name": "automation-gateway", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Affected", "package_name": "automation-platform-ui", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:optaplanner:::el6", "fix_state": "Affected", "package_name": "org.optaweb.vehiclerouting-optaweb-vehicle-routing", "product_name": "Red Hat build of OptaPlanner 8"}, {"cpe": "cpe:/a:redhat:podman_desktop:0", "fix_state": "Affected", "package_name": "rhdesktop/rh-podman-desktop-ext-bootc-rhel10", "product_name": "Red Hat Build of Podman Desktop - Tech Preview"}, {"cpe": "cpe:/a:redhat:podman_desktop:0", "fix_state": "Affected", "package_name": "rhdesktop/rh-podman-desktop-ext-openshift-local-rhel10", "product_name": "Red Hat Build of Podman Desktop - Tech Preview"}, {"cpe": "cpe:/a:redhat:podman_desktop:0", "fix_state": "Affected", "package_name": "rhdesktop/rh-podman-desktop-ext-redhat-account-rhel10", "product_name": "Red Hat Build of Podman Desktop - Tech Preview"}, {"cpe": "cpe:/a:redhat:podman_desktop:0", "fix_state": "Affected", "package_name": "rhdesktop/rh-podman-desktop-ext-rhel-rhel10", "product_name": "Red Hat Build of Podman Desktop - Tech Preview"}, {"cpe": "cpe:/a:redhat:podman_desktop:0", "fix_state": "Affected", "package_name": "rhdesktop/rh-podman-desktop-ext-sandbox-rhel10", "product_name": "Red Hat Build of Podman Desktop - Tech Preview"}, {"cpe": "cpe:/a:redhat:rhdh:1", "fix_state": "Affected", "package_name": "rhdh/rhdh-hub-rhel9", "product_name": "Red Hat Developer Hub"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Not affected", "package_name": "rhelai3/bootc-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Not affected", "package_name": "rhelai3/disk-image-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Affected", "package_name": "io.syndesis-syndesis-parent", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Affected", "package_name": "org.keycloak-keycloak-parent", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Affected", "package_name": "org.keycloak-keycloak-parent", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-ui-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Affected", "package_name": "devspaces/traefik-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:openshift_distributed_tracing:3", "fix_state": "Affected", "package_name": "rhosdt/tempo-jaeger-query-rhel8", "product_name": "Red Hat OpenShift distributed tracing 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Affected", "package_name": "org.keycloak-keycloak-parent", "product_name": "Red Hat Single Sign-On 7"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/rhtas-console-ui-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:ansible_portal:2", "fix_state": "Affected", "package_name": "ansible-automation-platform/automation-portal", "product_name": "Self-service automation portal 2"}], "public_date": "2026-02-25T02:08:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-27606\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-27606\nhttps://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2\nhttps://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e\nhttps://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3\nhttps://github.com/rollup/rollup/releases/tag/v2.80.0\nhttps://github.com/rollup/rollup/releases/tag/v3.30.0\nhttps://github.com/rollup/rollup/releases/tag/v4.59.0\nhttps://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.80.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.30.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.59.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "rollup", "source": "cna", "vendor": "rollup"}, "product": "rollup", "vendor": "rollup"}], "analysis": {"en": {"generated_at": "2026-04-18T10:50:11.324722+00:00", "value": {"mitigation_remediation": ["Upgrade Rollup to the latest patched version (v4.59.0, v3.30.0, or v2.80.0, or newer).", "If an upgrade is not immediately possible, enforce strict validation of all output filenames, removing any path traversal sequences, and audit or disable third\u2011party plugins that manipulate chunk names.", "Run Rollup builds within a restricted, least\u2011privilege environment, such as a dedicated CI container, to limit write permissions and prevent attackers from affecting critical system files."], "summary": {"action": "Apply Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The issue affects the Rollup JavaScript module bundler used in Node.js environments. Versions earlier than 2.80.0, 3.30.0, and 4.59.0 are vulnerable; those specific releases and any earlier iterations of Rollup 2.x, 3.x, and 4.x contain the flaw. The patched releases are documented in the Rollup changelog and can be retrieved from the official Rollup releases pages.", "description_and_impact": "This vulnerability arises from insufficient filename sanitization in Rollup's core engine, allowing an attacker to embed traversal sequences such as '../' when specifying output filenames through the CLI, manual chunk aliases, or malicious plugins. The flaw permits arbitrary file writes on the host filesystem wherever the build process runs, potentially overwriting critical configuration or executable files. The consequence is persistent remote code execution as the attacker can replace system binaries or scripts.", "risk_and_exploitability": "The CVSS score of 8.8 classifies the vulnerability as high severity. EPSS indicates a very low current exploitation probability (<1%), and it is not listed in the CISA KEV catalogue. Based on the description, it is inferred that any user who can supply input to the Rollup build process can trigger the flaw. Therefore, attackers could supply malicious filenames via the CLI, manual chunk aliases, or malicious plugins to overwrite arbitrary files, enabling remote code execution on the host system."}}}}, "created": "2026-02-25T11:35:07.254231+00:00", "updated": "2026-04-18T11:00:05.736270+00:00", "vendors": ["rollup", "rollup$PRODUCT$rollup"]}