CVE-2026-59638

Schwachstellenklasse

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 (2.1.X series).

Betroffene Produkte

• bouncycastle bc-java
• bouncycastle bctls-fips
• bouncycastle bouncy_castle_for_java_lts

Quellen

• https://github.com/bcgit/bc-java/commit/5ac55351cd1a8a7184d41c96a7ee87df0770240a
• https://github.com/bcgit/bc-java/commit/799bd15320a6310a447863638aa3df64acef829b
• https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059638