CVE-2026-33672

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Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to a method injection vulnerability affecting the `POSIX_REGEX_SOURCE` object. Because the object inherits from `Object.prototype`, specially crafted POSIX bracket expressions (e.g., `[[:constructor:]]`) can reference inherited method names. These methods are implicitly converted to strings and injected into the generated regular expression. This leads to incorrect glob matching behavior (integrity impact), where patterns may match unintended filenames. The issue does not enable remote code execution, but it can cause security-relevant logic errors in applications that rely on glob matching for filtering, validation, or access control. All users of affected `picomatch` versions that process untrusted or user-controlled glob patterns are potentially impacted. This issue is fixed in picomatch 4.0.4, 3.0.2 and 2.3.2. Users should upgrade to one of these versions or later, depending on their supported release line. If upgrading is not immediately possible, avoid passing untrusted glob patterns to picomatch. Possible mitigations include sanitizing or rejecting untrusted glob patterns, especially those containing POSIX character classes like `[[:...:]]`; avoiding the use of POSIX bracket expressions if user input is involved; and manually patching the library by modifying `POSIX_REGEX_SOURCE` to use a null prototype."}, {"lang": "es", "value": "Picomatch es un comparador de globs escrito en JavaScript. Las versiones anteriores a 4.0.4, 3.0.2 y 2.3.2 son vulnerables a una vulnerabilidad de inyecci\u00f3n de m\u00e9todos que afecta al objeto `POSIX_REGEX_SOURCE`. Debido a que el objeto hereda de `Object.prototype`, las expresiones de corchetes POSIX especialmente dise\u00f1adas (por ejemplo, '[[:constructor:]]') pueden hacer referencia a nombres de m\u00e9todos heredados. Estos m\u00e9todos se convierten impl\u00edcitamente en cadenas y se inyectan en la expresi\u00f3n regular generada. Esto conduce a un comportamiento incorrecto de coincidencia de globs (impacto en la integridad), donde los patrones pueden coincidir con nombres de archivo no deseados. El problema no permite la ejecuci\u00f3n remota de c\u00f3digo, pero puede causar errores l\u00f3gicos relevantes para la seguridad en aplicaciones que dependen de la coincidencia de globs para el filtrado, la validaci\u00f3n o el control de acceso. Todos los usuarios de las versiones afectadas de `picomatch` que procesan patrones de glob no confiables o controlados por el usuario est\u00e1n potencialmente afectados. Este problema se corrige en picomatch 4.0.4, 3.0.2 y 2.3.2. Los usuarios deben actualizar a una de estas versiones o posteriores, dependiendo de su l\u00ednea de lanzamiento compatible. Si la actualizaci\u00f3n no es posible de inmediato, evite pasar patrones de glob no confiables a picomatch. Las posibles mitigaciones incluyen sanear o rechazar patrones de glob no confiables, especialmente aquellos que contienen clases de caracteres POSIX como '[[:...:]]'; evitar el uso de expresiones de corchetes POSIX si hay entrada de usuario involucrada; y parchear manualmente la biblioteca modificando `POSIX_REGEX_SOURCE` para usar un prototipo nulo."}], "id": "CVE-2026-33672", "lastModified": "2026-06-17T10:37:54.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33672", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-27T13:31:31.464766Z", "version": "2.0.3"}}]}, "published": "2026-03-26T22:16:30.387", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "picomatch: Picomatch: Data integrity compromised via method injection with crafted POSIX bracket expressions", "id": "2451993", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451993"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-624", "details": ["A flaw was found in picomatch, a JavaScript glob matcher. A remote attacker could exploit a method injection vulnerability by providing specially crafted POSIX bracket expressions, such as [[:constructor:]]. This allows the attacker to inject inherited method names into generated regular expressions, leading to incorrect glob matching behavior. This issue can cause security-relevant logic errors in applications that use picomatch for filtering, validation, or access control, potentially compromising data integrity."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, applications should sanitize or reject untrusted glob patterns, particularly those containing POSIX character classes like `[[:...:]]`. Avoid using POSIX bracket expressions if user input is involved. No service restart or reload is typically required for this operational control, but applications should be re-evaluated to ensure proper input handling."}, "name": "CVE-2026-33672", "package_state": [{"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Fix deferred", "package_name": "picomatch", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:migration_toolkit_applications:8", "fix_state": "Fix deferred", "package_name": "mta/mta-ui-rhel9", "product_name": "Migration Toolkit for Applications 8"}, {"cpe": "cpe:/a:redhat:workload_availability_nhc:0", "fix_state": "Fix deferred", "package_name": "workload-availability/node-healthcheck-must-gather-rhel9", "product_name": "Node HealthCheck Operator"}, {"cpe": "cpe:/a:redhat:workload_availability_nhc:0", "fix_state": "Fix deferred", "package_name": "workload-availability/node-healthcheck-operator-bundle", "product_name": "Node HealthCheck Operator"}, {"cpe": "cpe:/a:redhat:workload_availability_nhc:0", "fix_state": "Fix deferred", 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"product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-data-science-pipelines-argo-workflowcontroller-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-console", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-console-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-monitoring-plugin-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/ocs-client-console-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/odf-console-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/odf-multicluster-console-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Fix deferred", "package_name": "devspaces/code-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:openshift_gitops:1", "fix_state": "Fix deferred", "package_name": "openshift-gitops-1/argocd-rhel8", "product_name": "Red Hat OpenShift GitOps"}, {"cpe": "cpe:/a:redhat:openshift_gitops:1", "fix_state": "Fix deferred", "package_name": "openshift-gitops-1/argocd-rhel9", "product_name": "Red Hat OpenShift GitOps"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform:7", "fix_state": "Fix deferred", "package_name": "picomatch", "product_name": "Red Hat Process Automation 7"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Fix deferred", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Fix deferred", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "nodejs-sass", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Fix deferred", "package_name": "picomatch", "product_name": "Red Hat Single Sign-On 7"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Fix deferred", "package_name": "rhtas/rekor-search-ui-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:amq_streams:2", "fix_state": "Fix deferred", "package_name": "picomatch", "product_name": "streams for Apache Kafka 2"}, {"cpe": "cpe:/a:redhat:amq_streams:3", "fix_state": "Fix deferred", "package_name": "picomatch", "product_name": "streams for Apache Kafka 3"}], "public_date": "2026-03-26T21:39:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-33672\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-33672\nhttps://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903\nhttps://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.0.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.3.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "picomatch", "vendor": "micromatch"}], "analysis": {"en": {"generated_at": "2026-04-02T04:15:49.861453+00:00", "value": {"mitigation_remediation": ["Upgrade picomatch to version 4.0.4, 3.0.2, 2.3.2 or later.", "If an upgrade is not immediately possible, avoid passing any untrusted glob patterns to picomatch.", "Sanitize or reject glob patterns that contain POSIX character classes such as [[:...:]] when user input is involved.", "Manually patch the library by setting POSIX_REGEX_SOURCE to use a null prototype to eliminate prototype chain access."], "summary": {"action": "Patch Immediately", "impact": "Integrity impact"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the Picomatch library distributed by micromatch. Versions older than 4.0.4, 3.0.2, and 2.3.2 are impacted. Any Node.js application that imports picomatch and processes user\u2011controlled glob patterns is potentially exposed.", "description_and_impact": "Picomatch, a JavaScript glob matcher, contains a method injection flaw in its POSIX_REGEX_SOURCE object. Because the object inherits from Object.prototype, an attacker can craft POSIX bracket expressions like [[:constructor:]] that reference inherited method names. These method names are coerced into strings and inserted into the generated regular expression, causing the glob pattern to match unintended filenames. The flaw does not provide remote code execution but leads to integrity\u2011level logic errors in any application that relies on picomatch for filtering, validation, or access control.", "risk_and_exploitability": "The flaw carries a CVSS score of 5.3 and an EPSS probability of less than 1%, indicating a moderate severity but low likelihood of exploitation. It is not listed in the CISA KEV catalog. Abuse requires only that an attacker supply a crafted glob pattern to the vulnerable library, which can happen through publicly exposed APIs or file\u2011system interfaces. While the attack surface is relatively narrow, the integrity consequences could allow an attacker to bypass file\u2011level restrictions or gain unexpected access within the application."}}}}, "created": "2026-03-27T08:31:41.193026+00:00", "updated": "2026-04-02T07:56:14.272208+00:00", "vendors": ["micromatch", "micromatch$PRODUCT$picomatch"]}