{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-114583", "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22", "state": "PUBLISHED", "assignerShortName": "PSF", "dateReserved": "2026-10-21T18:58:26.985Z", "datePublished": "2026-10-22T20:57:36.019Z", "dateUpdated": "2026-10-23T00:36:58.472Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["tarfile"], "product": "CPython", "repo": "https://github.com/python/cpython", "vendor": "Python Software Foundation", "versions": [{"lessThan": "3.16.0", "status": "affected", "version": "0", "versionType": "python"}]}], "credits": [{"lang": "en", "type": "coordinator", "value": "Stan Ulbrych (https://github.com/StanFromIreland)"}, {"lang": "en", "type": "remediation reviewer", "value": "Ethan Furman (https://github.com/ethanfurman)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"type": "text/html", "value": "tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter=\"tar\" to write files outside the destination directory, subject to the permissions of the extracting process.<br><br>This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter."}], "value": "tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter=\"tar\" to write files outside the destination directory, subject to the permissions of the extracting process.\n\nThis is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter."}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "baseScore": 6.9, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "providerMetadata": {"orgId": "28c92f92-d60d-412d-b760-e73465c3df22", "shortName": "PSF", "dateUpdated": "2026-10-23T00:36:58.472Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/python/cpython/pull/160098"}, {"tags": ["issue-tracking"], "url": "https://github.com/python/cpython/issues/160097"}, {"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/"}, {"tags": ["patch"], "url": "https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b"}, {"tags": ["patch"], "url": "https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477"}, {"tags": ["patch"], "url": "https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5"}], "source": {"discovery": "UNKNOWN"}, "title": "tar filter allows writing outside destination via empty-named symlink", "x_generator": {"engine": "cvelib 1.8.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["tarfile"], "product": "CPython", "repo": "https://github.com/python/cpython", "vendor": "Python Software Foundation", "versions": [{"lessThan": "3.16.0", "status": "affected", "version": "0", "versionType": "python"}]}], "source": "cna@python.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter=\"tar\" to write files outside the destination directory, subject to the permissions of the extracting process.\n\nThis is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter."}], "id": "CVE-2026-114583", "lastModified": "2026-10-23T01:16:53.540", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@python.org", "type": "Secondary"}]}, "published": "2026-10-22T21:17:16.543", "references": [{"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/issues/160097"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/160098"}, {"source": "cna@python.org", "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/"}], "sourceIdentifier": "cna@python.org", "vulnStatus": "Received"}

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