CVE-2026-59641

Weakness

In Bouncy Castle for Java before 1.85, S/MIME validator trusts signer-asserted signingTime for path validation. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcmail-fips and bcjmail-fips 1.0.7 (1.0.X series), 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).

Affected products

• bouncycastle bc-java
• bouncycastle bcjmail-fips
• bouncycastle bcmail-fips
• bouncycastle bouncy_castle_for_java_lts

References

• https://github.com/bcgit/bc-java/commit/2f81b22d559b3a1b026388e1ca78dd547384def8
• https://github.com/bcgit/bc-java/commit/fd89fe918b37fea1c71e95fae50284a325b09721
• https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059641