{"id":"CVE-2024-26134","aliases":["GHSA-375g-39jq-vq7m","PYSEC-2024-155"],"url":"https://o3.security/vulnerability/CVE-2024-26134","summary":"CBOR2 decoder has potential buffer overflow","details":"cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format. Starting in version 5.5.1 and prior to version 5.6.2, an attacker can crash a service using cbor2 to parse a CBOR binary by sending a long enough object. Version 5.6.2 contains a patch for this issue.","published":"2024-02-19T22:13:47.173Z","modified":"2026-07-22T02:51:10.433063Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"cbor2","fixedVersion":"5.6.2"}],"fix":{"url":"https://github.com/agronholm/cbor2/commit/387755eacf0be35591a478d3c67fe10618a6d542","label":"agronholm/cbor2@387755e"},"references":[{"type":"WEB","url":"https://github.com/agronholm/cbor2/releases/tag/5.6.2"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BT42VXZMMMCSSHMA65KKPOZCXJEYHNR5/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX524ZG2XJWFV37UQKQ4LWIH4UICSGEQ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PWC3VU6YV6EXKCSX5GTKWLBZIDIJNQJY/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26134.json"},{"type":"ADVISORY","url":"https://github.com/agronholm/cbor2/security/advisories/GHSA-375g-39jq-vq7m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26134"},{"type":"FIX","url":"https://github.com/agronholm/cbor2/commit/387755eacf0be35591a478d3c67fe10618a6d542"},{"type":"FIX","url":"https://github.com/agronholm/cbor2/commit/4de6991ba29bf2290d7b9d83525eda7d021873df"},{"type":"FIX","url":"https://github.com/agronholm/cbor2/pull/204"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-22T02:51:10.433063Z"}}