CVE-2026-49839

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{"affected": [{"affectedData": [{"product": "jq", "vendor": "jqlang", "versions": [{"status": "affected", "version": "< 1.8.2"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:*", "matchCriteriaId": "33B35B19-67AD-450E-A887-48A290566047", "versionEndExcluding": "1.8.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg(\"String too long\"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2."}, {"lang": "es", "value": "jq es un procesador JSON de l\u00ednea de comandos. Antes de 1.8.2, \u2019jq --rawfile\u2019 puede convertir un error de cadena sobredimensionada manejado en una reutilizaci\u00f3n de estado inv\u00e1lido y una escritura real fuera de l\u00edmites del heap en compilaciones con aserciones deshabilitadas. Cuando jv_load_file(raw=1) lee un archivo controlado por el atacante, a\u00f1ade repetidamente fragmentos de archivo al mismo acumulador de cadenas jv. Una vez que jv_string_append_buf() devuelve jv_invalid_with_msg(\u2019String too long\u2019), el bucle de archivo raw no se detiene. Si el archivo contiene al menos un byte m\u00e1s, la siguiente iteraci\u00f3n del bucle a\u00f1ade un nuevo fragmento a un objeto que ya es inv\u00e1lido. Con las aserciones habilitadas, esto aborta en jvp_string_ptr(). Con las aserciones deshabilitadas, el objeto inv\u00e1lido se interpreta como un objeto de cadena y ASan informa de un desbordamiento de b\u00fafer del heap. Esta vulnerabilidad est\u00e1 corregida en 1.8.2."}], "id": "CVE-2026-49839", "lastModified": "2026-10-25T22:10:00.150", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49839", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-25T17:55:24.168681Z", "version": "2.0.3"}}]}, "published": "2026-06-25T18:16:38.917", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/jqlang/jq/security/advisories/GHSA-cfh2-vwfq-qfmm"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/jqlang/jq/security/advisories/GHSA-cfh2-vwfq-qfmm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2026:29986", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "jq-main-1.8.2-0.1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-06-25T00:00:00Z"}], "bugzilla": {"description": "jq: jq: Heap out-of-bounds write via oversized raw file processing", "id": "2493020", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2493020"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H", "status": "verified"}, "cwe": "CWE-787", "details": ["jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg(\"String too long\"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2.", "A flaw was found in jq, a command-line JSON processor. This vulnerability allows an attacker to trigger a heap out-of-bounds write by providing a specially crafted, oversized file to the `jq --rawfile` option. This can lead to a denial of service (DoS), making the affected system or application unavailable, and may also impact data integrity. Exploitation requires user interaction, as a user must process the malicious file."], "mitigation": {"lang": "en:us", "value": "Avoid using `jq --rawfile` with untrusted or user-controlled files."}, "name": "CVE-2026-49839", "package_state": [{"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/controller-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/hub-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-27/controller-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-27/hub-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "automation-controller", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ceph_storage:4", "fix_state": "Fix deferred", "package_name": "jq", "product_name": "Red Hat Ceph Storage 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "jq", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "jq", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "jq", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-06-25T17:17:46Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-49839\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-49839\nhttps://github.com/jqlang/jq/security/advisories/GHSA-cfh2-vwfq-qfmm"], "statement": "A flaw was found in jq, a command-line JSON processor. When using the `--rawfile` option to process an oversized file, jq can trigger a heap out-of-bounds write in assertion-disabled builds (typical for release builds). Exploitation requires a local user to explicitly process an attacker-controlled file. With assertions enabled, the process aborts instead of corrupting memory.", "threat_severity": "Moderate"}

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