{"action":"Upgrade protobuf to 3.21.9-3 or later.","affected":[{"fixed":"3.21.9-3","introduced":"0"}],"component":"protobuf","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["3.21.9-3"],"id":"tcs_01M5NFE67Z8S8W2Y68XGAJJ4SP","modified_at":"2026-10-23T18:04:49.400231531Z","published_at":"2022-01-10T14:10:16.747Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-22569","https://security-tracker.debian.org/tracker/CVE-2021-22569"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-22569#Debian:13/protobuf","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-22569"}],"summary":"An issue in protobuf-java allowed the interleaving of com.google.protobuf.UnknownFieldSet fields in such a way that would be processed out of order. A small malicious payload can occupy the parser for"}