{"action":"Upgrade cbor2 to 5.9.0-1 or later.","affected":[{"fixed":"5.9.0-1","introduced":"0"}],"component":"cbor2","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["5.9.0-1"],"id":"tcs_01M5NR59AFEDK4JFWMA2MGSB7G","modified_at":"2026-10-01T03:03:21.529015299Z","published_at":"2026-03-23T19:16:39.530Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-26209","https://security-tracker.debian.org/tracker/CVE-2026-26209"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-26209#Debian:14/cbor2","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-26209"}],"summary":"cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format. Versions prior to 5.9.0 are vulnerable to a Denial of Service (DoS) attack caused by unco"}