{"id":"CVE-2020-29367","aliases":["GHSA-8c7c-2c8j-3xfp"],"url":"https://o3.security/vulnerability/CVE-2020-29367","summary":"blosc2 heap-based buffer overflow","details":"blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when there is a lack of space to write compressed data.","published":"2020-11-27T20:15:11.090Z","modified":"2026-07-08T21:26:00.373465Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.01201,"percentile":0.66169,"asOf":"2026-09-08"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"blosc2","fixedVersion":"0.1.7"}],"fix":{"url":"https://github.com/Blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043ee","label":"Blosc/c-blosc2@c4c6470"},"references":[{"type":"ADVISORY","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26442"},{"type":"FIX","url":"https://github.com/Blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043ee"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-29367"},{"type":"PACKAGE","url":"https://github.com/Blosc/python-blosc2"},{"type":"WEB","url":"https://github.com/Blosc/python-blosc2/releases/tag/v0.1.7"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/blosc2/PYSEC-2020-343.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T21:26:00.373465Z"}}