{"action":"Upgrade bouncycastle to 1.86-1 or later.","affected":[{"fixed":"1.86-1","introduced":"0"}],"component":"bouncycastle","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.86-1"],"id":"tcs_01M5NTYC4RQP1DW0S5D8J9205T","modified_at":"2026-10-07T09:47:29.729323093Z","published_at":"2026-10-03T09:17:04.730Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-71885","https://security-tracker.debian.org/tracker/CVE-2026-71885"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-71885#Debian:14/bouncycastle","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-71885"}],"summary":"In Bouncy Castle for Java before 1.86, the Messaging Layer Security (MLS, RFC 9420) implementation did not bind an X.509 credential to a LeafNode's signature_key. LeafNode.verify() checked a leaf's si"}