{"id":"PYSEC-2024-155","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.","aliases":["CVE-2024-26134","GHSA-375g-39jq-vq7m"],"modified":"2026-02-04T14:28:14.681606Z","published":"2024-02-19T23:15:07Z","related":["GHSA-375g-39jq-vq7m"],"references":[{"type":"ADVISORY","url":"https://github.com/agronholm/cbor2/security/advisories/GHSA-375g-39jq-vq7m"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BT42VXZMMMCSSHMA65KKPOZCXJEYHNR5/"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX524ZG2XJWFV37UQKQ4LWIH4UICSGEQ/"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PWC3VU6YV6EXKCSX5GTKWLBZIDIJNQJY/"},{"type":"EVIDENCE","url":"https://github.com/agronholm/cbor2/security/advisories/GHSA-375g-39jq-vq7m"},{"type":"FIX","url":"https://github.com/agronholm/cbor2/commit/387755eacf0be35591a478d3c67fe10618a6d542"},{"type":"FIX","url":"https://github.com/agronholm/cbor2/commit/4de6991ba29bf2290d7b9d83525eda7d021873df"},{"type":"REPORT","url":"https://github.com/agronholm/cbor2/pull/204"},{"type":"WEB","url":"https://github.com/agronholm/cbor2/releases/tag/5.6.2"}],"affected":[{"package":{"name":"cbor2","ecosystem":"PyPI","purl":"pkg:pypi/cbor2"},"ranges":[{"type":"GIT","repo":"https://github.com/agronholm/cbor2","events":[{"introduced":"0"},{"fixed":"387755eacf0be35591a478d3c67fe10618a6d542"},{"fixed":"4de6991ba29bf2290d7b9d83525eda7d021873df"},{"fixed":"387755eacf0be35591a478d3c67fe10618a6d542"},{"fixed":"4de6991ba29bf2290d7b9d83525eda7d021873df"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.1"},{"fixed":"5.6.2"}]}],"versions":["5.5.1","5.6.0","5.6.1"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/cbor2/PYSEC-2024-155.yaml"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}