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CVE-2026-4360

In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:beb03aa1919aa0e871240e16fc2df2a1002bb0858a669b4a275860e7f38542d3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","modules":["tarfile"],"product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"lessThan":"3.15.0b4","status":"affected","version":"0","versionType":"python"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-281","description":"CWE-281","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/problemTypes/0/descriptions/0

Source references

9 source assertions
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/3
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/cf23b9153181062150d061468b6d24af33fe214f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/8
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/d2b2f5eacab4dd48446b63340613b05dcbbf0b44"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/7
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/151987"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/2
{"tags":["patch"],"url":"https://github.com/python/cpython/pull/151988"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a083d0efc7501d70c77128bb8029fb51999c64d64286f7af1d4c66b34b47c592 · sha256:98d86d6242da0596… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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