CVE-2026-19672

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-19672", "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22", "state": "PUBLISHED", "assignerShortName": "PSF", "dateReserved": "2026-08-12T21:17:15.148Z", "datePublished": "2026-08-19T15:24:08.616Z", "dateUpdated": "2026-08-27T19:41:14.871Z"}, "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": "reporter", "value": "Lohinth (https://github.com/l0h1nth)"}, {"lang": "en", "type": "coordinator", "value": "Stan Ulbrych (https://github.com/StanFromIreland)"}, {"lang": "en", "type": "remediation reviewer", "value": "Petr Viktorin (https://github.com/encukou)"}, {"lang": "en", "type": "remediation reviewer", "value": "Ethan Furman (https://github.com/ethanfurman)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"type": "text/html", "value": "The <span>tarfile</span> module's <span>tar</span> and <span>data</span>\n extraction filters created directories outside the destination for \nmembers whose name leaves the destination and returns to it, such as <span>../evil/../dest/sub/file</span>. The containment check used the resolved path, but intermediate directories were created from the name as given.<br><br>Only\n empty directories are created outside the destination. Member contents \nare still extracted inside it. To return to the destination the member's\n name must contain the destination directory's own final component, so \nextraction into a secure randomised directory is not affected.<br><br>This affects POSIX platforms only. On Windows, <span>..</span> components are collapsed before the path reaches the filesystem, so the directories outside the destination are never created."}], "value": "The tarfile module's tar and data\n extraction filters created directories outside the destination for \nmembers whose name leaves the destination and returns to it, such as ../evil/../dest/sub/file. The containment check used the resolved path, but intermediate directories were created from the name as given.\n\nOnly\n empty directories are created outside the destination. Member contents \nare still extracted inside it. To return to the destination the member's\n name must contain the destination directory's own final component, so \nextraction into a secure randomised directory is not affected.\n\nThis affects POSIX platforms only. On Windows, .. components are collapsed before the path reaches the filesystem, so the directories outside the destination are never created."}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 6.3, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "providerMetadata": {"orgId": "28c92f92-d60d-412d-b760-e73465c3df22", "shortName": "PSF", "dateUpdated": "2026-08-19T15:24:08.616Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/python/cpython/pull/156000"}, {"tags": ["issue-tracking"], "url": "https://github.com/python/cpython/pull/156000"}, {"tags": ["vendor-advisory"], "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/J2WT2ALRWEXQJOB3C7Q2HYWUXP3CINWO/"}], "source": {"discovery": "UNKNOWN"}, "title": "tarfile extraction filter bypass allows creation of directories outside the destination"}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/08/25/10"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-08-26T01:30:52.965Z"}}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-22", "lang": "en", "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-26T19:28:09.797384Z", "id": "CVE-2026-19672", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-27T19:41:14.871Z"}}]}}

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The containment check used the resolved path, but intermediate directories were created from the name as given.\n\nOnly\n empty directories are created outside the destination. Member contents \nare still extracted inside it. To return to the destination the member's\n name must contain the destination directory's own final component, so \nextraction into a secure randomised directory is not affected.\n\nThis affects POSIX platforms only. On Windows, .. components are collapsed before the path reaches the filesystem, so the directories outside the destination are never created.", "supportingMedia": [{"type": "text/html", "value": "The <span>tarfile</span> module's <span>tar</span> and <span>data</span>\n extraction filters created directories outside the destination for \nmembers whose name leaves the destination and returns to it, such as <span>../evil/../dest/sub/file</span>. The containment check used the resolved path, but intermediate directories were created from the name as given.<br><br>Only\n empty directories are created outside the destination. Member contents \nare still extracted inside it. To return to the destination the member's\n name must contain the destination directory's own final component, so \nextraction into a secure randomised directory is not affected.<br><br>This affects POSIX platforms only. On Windows, <span>..</span> components are collapsed before the path reaches the filesystem, so the directories outside the destination are never created."}]}], "providerMetadata": {"orgId": "28c92f92-d60d-412d-b760-e73465c3df22", "shortName": "PSF", "dateUpdated": "2026-08-19T15:24:08.616Z"}}}, "cveMetadata": {"cveId": "CVE-2026-19672", "state": "PUBLISHED", "dateUpdated": "2026-08-26T19:28:47.590Z", "dateReserved": "2026-08-12T21:17:15.148Z", "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22", "datePublished": "2026-08-19T15:24:08.616Z", "assignerShortName": "PSF"}, "dataVersion": "5.2"}

{"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": "The tarfile module's tar and data\n extraction filters created directories outside the destination for \nmembers whose name leaves the destination and returns to it, such as ../evil/../dest/sub/file. The containment check used the resolved path, but intermediate directories were created from the name as given.\n\nOnly\n empty directories are created outside the destination. Member contents \nare still extracted inside it. To return to the destination the member's\n name must contain the destination directory's own final component, so \nextraction into a secure randomised directory is not affected.\n\nThis affects POSIX platforms only. On Windows, .. components are collapsed before the path reaches the filesystem, so the directories outside the destination are never created."}], "id": "CVE-2026-19672", "lastModified": "2026-08-28T21:16:15.740", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "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": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@python.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-19672", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-26T19:28:09.797384Z", "version": "2.0.3"}}]}, "published": "2026-08-19T16:17:06.593", "references": [{"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/156000"}, {"source": "cna@python.org", "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/J2WT2ALRWEXQJOB3C7Q2HYWUXP3CINWO/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/08/25/10"}], "sourceIdentifier": "cna@python.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2026:65505", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "python3-14-main-3.14.7-1.1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-09-08T00:00:00Z"}, {"advisory": "RHSA-2026:65513", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "python3-10-main-3.10.21-1.1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-09-08T00:00:00Z"}, {"advisory": "RHSA-2026:65525", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "python3-11-main-3.11.16-1.2.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-09-08T00:00:00Z"}, {"advisory": "RHSA-2026:65531", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "python3-12-main-3.12.14-1.1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-09-08T00:00:00Z"}, {"advisory": "RHSA-2026:65567", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "python3-13-main-3.13.15-1.1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-09-08T00:00:00Z"}], "bugzilla": {"description": "python: Python tarfile module: Directory traversal allows creation of empty directories outside extraction destination", "id": "2519726", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519726"}, "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": "verified"}, "cwe": "CWE-22", "details": ["The tarfile module's tar and data\nextraction filters created directories outside the destination for \nmembers whose name leaves the destination and returns to it, such as ../evil/../dest/sub/file. The containment check used the resolved path, but intermediate directories were created from the name as given.\nOnly\nempty directories are created outside the destination. Member contents \nare still extracted inside it. To return to the destination the member's\nname must contain the destination directory's own final component, so \nextraction into a secure randomised directory is not affected.\nThis affects POSIX platforms only. On Windows, .. components are collapsed before the path reaches the filesystem, so the directories outside the destination are never created.", "A flaw was found in the Python `tarfile` module. This vulnerability allows an attacker to create empty directories outside of the intended extraction destination on POSIX (Portable Operating System Interface) platforms. This occurs when processing a specially crafted archive containing member names that use directory traversal sequences (e.g., `../`) to leave and then re-enter the target directory. While only empty directories are created outside the destination, this can lead to unintended file system modifications."], "name": "CVE-2026-19672", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "hi/python", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-08-19T15:24:08Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-19672\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-19672\nhttps://github.com/python/cpython/pull/156000\nhttps://mail.python.org/archives/list/security-announce@python.org/thread/J2WT2ALRWEXQJOB3C7Q2HYWUXP3CINWO/"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.16.0)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "CPython", "source": "cna", "vendor": "Python Software Foundation"}, "product": "cpython", "vendor": "python"}], "created": "2026-08-19T16:45:03.165979+00:00", "updated": "2026-08-28T06:15:03.982378+00:00", "vendors": ["python", "python$PRODUCT$cpython"]}