{"action":"Upgrade protobuf to 3.21.12-11+deb13u1 or later.","affected":[{"fixed":"3.21.12-11+deb13u1","introduced":"0"}],"component":"protobuf","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["3.21.12-11+deb13u1"],"id":"tcs_01M5NTD5HFPR1696BBTWWKGKMP","modified_at":"2026-10-01T03:03:37.224844528Z","published_at":"2026-04-16T15:17:41.910Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-6409","https://security-tracker.debian.org/tracker/CVE-2026-6409"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-6409#Debian:13/protobuf","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-6409"}],"summary":"A Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input. Maliciously structured messages—specifically those containing negative varints or deep"}