{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"bouncycastle","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":[],"id":"tcs_01M5NQW2SX8KKJSMBBTHQVDA2E","modified_at":"2026-10-07T09:47:35.577290599Z","published_at":"2026-10-03T09:17:04.360Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-18040","https://security-tracker.debian.org/tracker/CVE-2026-18040"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-18040#Debian:13/bouncycastle","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-18040"}],"summary":"In Bouncy Castle for Java before 1.86, HQC leaked secret-derived data through two side channels: its GF(2^8) arithmetic used lookup tables indexed by field elements, making the cache line touched a fu"}