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Known vulnerabilities in Legion of the Bouncy Castle Inc. BC-JAVA

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CVE Summary Score Published
CVE-2026-71885 In Bouncy Castle for Java before 1.86, the Messaging Layer Security (MLS, RFC 9420) implementation did not bind an X.509… 9.2 Critical Oct 3, 2026
CVE-2026-58062 In Bouncy Castle for Java before 1.85, Stapled OCSP response accepted without binding to the checked certificate 9.3 Critical Aug 3, 2026
CVE-2026-59638 In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in 9.3 Critical Aug 3, 2026
CVE-2026-59650 In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value 9.3 Critical Aug 3, 2026
CVE-2026-8763 In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI 9.3 Critical Aug 3, 2026
CVE-2025-14813 : Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc 9.3 Critical Apr 15, 2026

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