CVE-2026-101894

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{"affected": [{"affectedData": [{"product": "decompress", "vendor": "XhmikosR", "versions": [{"status": "affected", "version": "< 10.2.2"}, {"status": "affected", "version": ">= 11.0.0, < 11.1.4"}]}, {"product": "decompress", "vendor": "kevva", "versions": [{"status": "affected", "version": "<= 4.2.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The decompress package for Node.js extracts archives. Prior to 10.2.2 and 11.1.4, the default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution. The maintained @xhmikosr/decompress package is fixed in 10.2.2 and 11.1.4, but the separately affected unmaintained decompress package remains unpatched through 4.2.1. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486. @xhmikosr/decompress is fixed in versions 10.2.2 and 11.1.4."}], "id": "CVE-2026-101894", "lastModified": "2026-09-30T19:38:27.293", "metrics": {"cvssMetricV31": [{"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": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-101894", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-28T17:38:56.943847Z", "version": "2.0.3"}}]}, "published": "2026-09-28T17:17:48.830", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/XhmikosR/decompress/commit/5f4b2f64abb31bbaf1fef8975b595fd7df2558d8"}, {"source": "security-advisories@github.com", "url": "https://github.com/XhmikosR/decompress/commit/f6c88c668216d6a12c6cecf4fe0b6c70bf77050a"}, {"source": "security-advisories@github.com", "url": "https://github.com/XhmikosR/decompress/releases/tag/v10.2.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/XhmikosR/decompress/releases/tag/v11.1.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/XhmikosR/decompress/security/advisories/GHSA-hrh2-vp3x-79xf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-59"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "@xhmikosr/decompress: @xhmikosr/decompress: Path traversal via symlink chain", "id": "2542567", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542567"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-59", "details": ["The decompress package for Node.js extracts archives. Prior to 10.2.2 and 11.1.4, the default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution. The maintained @xhmikosr/decompress package is fixed in 10.2.2 and 11.1.4, but the separately affected unmaintained decompress package remains unpatched through 4.2.1. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486. @xhmikosr/decompress is fixed in versions 10.2.2 and 11.1.4.", "A flaw was found in the @xhmikosr/decompress and decompress packages for Node.js. The default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-101894", "package_state": [{"cpe": "cpe:/a:redhat:migration_toolkit_applications:8", "fix_state": "Not affected", "package_name": "decompress", "product_name": "Migration Toolkit for Applications 8"}], "public_date": "2026-09-28T16:57:11Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-101894\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-101894\nhttps://github.com/XhmikosR/decompress/commit/5f4b2f64abb31bbaf1fef8975b595fd7df2558d8\nhttps://github.com/XhmikosR/decompress/commit/f6c88c668216d6a12c6cecf4fe0b6c70bf77050a\nhttps://github.com/XhmikosR/decompress/releases/tag/v10.2.2\nhttps://github.com/XhmikosR/decompress/releases/tag/v11.1.4\nhttps://github.com/XhmikosR/decompress/security/advisories/GHSA-hrh2-vp3x-79xf"], "statement": "A flaw was found in the @xhmikosr/decompress npm package for Node.js. The default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory, allowing files outside output to be read or written. This vulnerability is a bypass of the incomplete hardening for CVE-2026-53486. The @xhmikosr/decompress package is fixed in versions 10.2.2 and 11.1.4. The unmaintained decompress package remains unpatched through 4.2.1.\nIn Red Hat products, the affected component is only present as a dev dependency (build-time only) and is not shipped in runtime container images.", "threat_severity": "Important"}

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