{"id":"CVE-2026-59644","summary":"MLS hash-ratchet honours arbitrary 32-bit generation counter from sender","details":"In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.","modified":"2026-08-03T11:45:24.063946178Z","published":"2026-08-03T00:50:50.154Z","database_specific":{"cna_assigner":"bcorg","cwe_ids":["CWE-834"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59644.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59644.json"},{"type":"PACKAGE","url":"https://github.com/bcgit/bc-java"},{"type":"FIX","url":"https://github.com/bcgit/bc-java/commit/610d8757d855afe197df0de6d831cb75c81e3b9f"},{"type":"ADVISORY","url":"https://github.com/bcgit/bc-java/wiki/CVE-2026-59644"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59644"},{"type":"WEB","url":"https://www.bouncycastle.org/download/bouncy-castle-java/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bcgit/bc-java","events":[{"introduced":"9032821b326fba9fec7528899dfffa79f9f19aef"},{"fixed":"57fbd3c501f7a369f64eda311d6a709fc0bcae84"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.73"},{"fixed":"1.85"}]}}],"versions":["r1rv84","r1rv81","r1rv83","r1rv82","r1rv80","r1rv78","r1rv77","r1rv76","r1rv75","r1rv74","r1rv73"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59644.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber"}]}