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CVE-2026-9669

bz2.BZ2Decompressor objects could be reused after a decompression error. If an application caught the resulting OSError and retried with the same decompressor, crafted input could cause the decompressor to resume from an invalid internal state and perform out-of-bounds writes to a stack buffer. This could crash the process when processing untrusted data.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3f755a5e19d8cf9e75eb8e890dd4f3c4ea0c5faea5b7455bc80c92d5eddc2ef1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","modules":["bz2"],"product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"lessThan":"3.13.14","status":"affected","version":"0","versionType":"python"},{"lessThan":"3.14.6","status":"affected","version":"3.14.0","versionType":"python"},{"lessThan":"3.15.0b3","status":"affected","version":"3.15.0a1","versionType":"python"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-121","description":"CWE-121 Stack-based buffer overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/problemTypes/0/descriptions/0

Source references

9 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/06/08/17"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/adp/0/references/0
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/157a5df8cb5d82b33f918a7489e72ce95ceb12b6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/3
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/5755d0f083949ff3c5bf3a37e673e24e306b036e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/619a12b2e545391dc436b3af79dda22337382a6f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/938ec030e90c5e53f1faac6fab1643f14e4f4a79"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/7
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/d3ca26983dfbccdf609f24ff5877dc3118e4702d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/150599"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/2
{"tags":["patch"],"url":"https://github.com/python/cpython/pull/150600"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/0
{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/DBJZETMGUIFK7DVUWMOXHD3Z6IX2QPSX/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d062db81c65acf57ba58d0f46b396ee16bd194dbcb338de5668476949c7c2bee · sha256:db3251957933a1e9… · /containers/cna/references/1

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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