CVE-2026-54552

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{"affected": [{"affectedData": [{"product": "sh", "vendor": "amoffat", "versions": [{"status": "affected", "version": "< 2.2.4"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "sh provides Python process launching. Prior to 2.2.4, the _uid option in sh.py performs an incomplete privilege drop on Linux and Unix-like systems. When sh runs from an elevated process and launches a command with _uid set to an unprivileged user, the child changes its UID but can retain the parent process's supplementary groups because the privilege-drop sequence does not fully establish the target user's UID, primary GID, and supplementary groups. The child can therefore retain access to files or resources granted to privileged groups such as root, docker, disk, shadow, or sudo, violating the expected _uid privilege boundary. This issue is fixed in version 2.2.4."}, {"lang": "es", "value": "sh proporciona el lanzamiento de procesos Python. Antes de la 2.2.4, la opci\u00f3n _uid en sh.py realiza una ca\u00edda de privilegios incompleta en sistemas Linux y similares a Unix. Cuando sh se ejecuta desde un proceso elevado y lanza un comando con _uid establecido a un usuario no privilegiado, el proceso hijo cambia su UID pero puede retener los grupos suplementarios del proceso padre porque la secuencia de ca\u00edda de privilegios no establece completamente el UID, GID primario y grupos suplementarios del usuario objetivo. Por lo tanto, el proceso hijo puede retener el acceso a archivos o recursos otorgados a grupos privilegiados como root, docker, disk, shadow o sudo, violando el l\u00edmite de privilegios _uid esperado. Este problema se corrige en la versi\u00f3n 2.2.4."}], "id": "CVE-2026-54552", "lastModified": "2026-10-22T22:10:00.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 7.9, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.5, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54552", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-18T18:44:23.350805Z", "version": "2.0.3"}}]}, "published": "2026-08-18T18:18:23.147", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/amoffat/sh/commit/3d855daba91f87a089b490c0d1cf1df3faace2f1"}, {"source": "security-advisories@github.com", "url": "https://github.com/amoffat/sh/pull/776"}, {"source": "security-advisories@github.com", "url": "https://github.com/amoffat/sh/releases/tag/2.2.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/amoffat/sh/security/advisories/GHSA-q38v-wp89-2w55"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-273"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "sh: sh: Incomplete privilege drop allows child processes to retain privileged group access.", "id": "2518108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2518108"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-273", "details": ["sh provides Python process launching. Prior to 2.2.4, the _uid option in sh.py performs an incomplete privilege drop on Linux and Unix-like systems. When sh runs from an elevated process and launches a command with _uid set to an unprivileged user, the child changes its UID but can retain the parent process's supplementary groups because the privilege-drop sequence does not fully establish the target user's UID, primary GID, and supplementary groups. The child can therefore retain access to files or resources granted to privileged groups such as root, docker, disk, shadow, or sudo, violating the expected _uid privilege boundary. This issue is fixed in version 2.2.4.", "A flaw was found in sh, a Python library for process launching. When sh runs from an elevated process and launches a command with the `_uid` option set to an unprivileged user, the child process may retain the parent process's supplementary groups. This incomplete privilege drop can allow the child process to retain access to files or resources granted to privileged groups, leading to unauthorized access and potential privilege escalation."], "name": "CVE-2026-54552", "package_state": [{"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/ocp-virt-validation-checkup-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}], "public_date": "2026-08-18T17:37:40Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-54552\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-54552\nhttps://github.com/amoffat/sh/commit/3d855daba91f87a089b490c0d1cf1df3faace2f1\nhttps://github.com/amoffat/sh/pull/776\nhttps://github.com/amoffat/sh/releases/tag/2.2.4\nhttps://github.com/amoffat/sh/security/advisories/GHSA-q38v-wp89-2w55"], "threat_severity": "Important"}

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