{"cve":"CVE-2026-9669","nvd":{"published":"2026-06-08T23:17:25.170","modified":"2026-08-13T01:16:56.087","status":"Awaiting Analysis","description":"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.","cvss_v4":{"vector":"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","score":8.2},"cvss_v3":null,"cwes":["CWE-121"],"references":["https://github.com/python/cpython/commit/157a5df8cb5d82b33f918a7489e72ce95ceb12b6","https://github.com/python/cpython/commit/1ba6135eae75ad8413413caeeedb56ae72320636","https://github.com/python/cpython/commit/5755d0f083949ff3c5bf3a37e673e24e306b036e","https://github.com/python/cpython/commit/619a12b2e545391dc436b3af79dda22337382a6f","https://github.com/python/cpython/commit/938ec030e90c5e53f1faac6fab1643f14e4f4a79"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-9669","score":0.00428,"percentile":0.37048,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}