{"action":"Upgrade protobuf to 3.21.12-12 or later.","affected":[{"fixed":"3.21.12-12","introduced":"0"}],"component":"protobuf","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["3.21.12-12"],"id":"tcs_01M5NNXB0JZGJ3WZVVGVH7QKYE","modified_at":"2026-09-01T20:05:52.639550604Z","published_at":"2025-06-16T15:15:24.990Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-4565","https://security-tracker.debian.org/tracker/CVE-2025-4565"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-4565#Debian:14/protobuf","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-4565"}],"summary":"Any project that uses Protobuf Pure-Python backend to parse untrusted Protocol Buffers data containing an arbitrary number of recursive groups, recursive messages or a series of SGROUP tags can be cor"}