UBUNTU-CVE-2026-59638

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

UBUNTU-CVE-2026-59650

In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value. This issue also affects Bouncy Castle for Java LTS before 2.73.12...

UBUNTU-CVE-2026-59649

In Bouncy Castle for Java before 1.85, OpenPGP user-attribute subpacket length bounded only by JVM max memory. 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 serie...

UBUNTU-CVE-2026-59640

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 1.0.13 1.0.X series, 2.0.13 2.0.X series and 2.1.13 2.1.X series...

UBUNTU-CVE-2026-59645

In Bouncy Castle for Java before 1.85, OER parser recurses without depth limit on self-referential IEEE 1609.2 schema. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bcutil-fips 2.0.7 2.0.X series and 2.1.7 2.1.X series...

CVE-2026-59650

In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value. This issue also affects Bouncy Castle for Java LTS before 2.73.12...

CVE-2026-59638

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

CVE-2026-59638 JSSE hostname verifier CN-fallback enabled by default despite documented opt-in

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

CVE-2026-59638

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

EUVD-2026-52016

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

CVE-2026-59638

In BCJava prior to 1.85 (and BC-LTS before 2.73.12; BC-FJA before bctls-fips 1.0.24/2.0.24/2.1.24), the JSSE hostname verifier CN-fallback is enabled by default despite documented opt-in. This may allow hostname verification to be skipped in TLS, with CVSS v4.0 base score 9.3 (CRITICAL) and impac...

CVE-2026-59638 JSSE hostname verifier CN-fallback enabled by default despite documented opt-in

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

CVE-2026-59638 JSSE hostname verifier CN-fallback enabled by default despite documented opt-in

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

CVE-2026-59638

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

CVE-2026-59639

In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bcpkix-fips 1.0.12 1.0.X series, 2.0.12 2.0.X series and 2.1.12 2.1.X series...

CVE-2026-59639

In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bcpkix-fips 1.0.12 1.0.X series, 2.0.12 2.0.X series and 2.1.12 2.1.X series...

CVE-2026-59639

In BC Java, CVE-2026-59639 affects Bouncy Castle for Java prior to 1.85, where CMS verifySignatures erroneously returns true for SignedData with zero signers. The issue also affects Java LTS prior to 2.73.12 and BC-FJA prior to bcpkix-fips 1.0.12 (1.0.x), 2.0.12 (2.0.x), and 2.1.12 (2.1.x). Impac...

CVE-2026-59639 CMS verifySignatures returns true for SignedData with zero signers

In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bcpkix-fips 1.0.12 1.0.X series, 2.0.12 2.0.X series and 2.1.12 2.1.X series...

CVE-2026-59639 CMS verifySignatures returns true for SignedData with zero signers

In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bcpkix-fips 1.0.12 1.0.X series, 2.0.12 2.0.X series and 2.1.12 2.1.X series...

CVE-2026-59639

In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bcpkix-fips 1.0.12 1.0.X series, 2.0.12 2.0.X series and 2.1.12 2.1.X series...