{"id":"CVE-2026-59640","title":"In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths","summary":"In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0…","severity":"high","cwe":["CWE-203","CWE-208"],"published":"2026-08-03","updated":"2026-08-03","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59640","references":[{"url":"https://github.com/bcgit/bc-java/commit/6b94b1c146cec1f565d9a85847fae511af77503e","label":"91579145-5d7b-4cc5-b925-a0262ff19630"},{"url":"https://github.com/bcgit/bc-java/wiki/CVE-2026-59640","label":"91579145-5d7b-4cc5-b925-a0262ff19630"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59640.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-59640"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2510200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-59640"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59640"}],"tags":["nvd","csaf","vex","red-hat"],"ingestedAt":"2026-08-03T01:21:07.756Z","epss":0.00347,"epssPercentile":0.28085,"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","affected":["jboss_enterprise_application_platform 7","single_sign_on 7"],"cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvssSource":"vendor","slug":"CVE-2026-59640","body":"## Overview\n\nIn Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7 · no fix planned: Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59640.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":222925,"id":"CVE-2026-59640","ts":1792151709052,"field":"cvss","old":null,"new":"7.5"},{"seq":222924,"id":"CVE-2026-59640","ts":1792151709052,"field":"severity","old":"none","new":"high"}]}