CVE-2026-59641

UNKNOWN 0.0

S/MIME validator trusts signer-asserted signingTime for path validation

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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).

CWE	CWE-345
Vendor	legion of the bouncy castle inc.
Product	bc-java
Published	Aug 3, 2026

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Affected Versions

Legion of the Bouncy Castle Inc. / BC-JAVA

0 < 1.85

Legion of the Bouncy Castle Inc. / BC-LTS-JAVA

2.73.0 < 2.73.12

Legion of the Bouncy Castle Inc. / BC-FJA

1.0.0 < 1.0.7 2.0.0 < 2.0.7 2.1.0 < 2.1.7

Legion of the Bouncy Castle Inc. / BC-FJA

1.0.4 < 1.0.7 2.0.0 < 2.0.7 2.1.0 < 2.1.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/bcgit/bc-java/wiki/CVE-2026-59641 github.com: https://github.com/bcgit/bc-java/commit/2f81b22d559b3a1b026388e1ca78dd547384def8 github.com: https://github.com/bcgit/bc-java/commit/fd89fe918b37fea1c71e95fae50284a325b09721

Credits

🔍 Alex Gaynor in collaboration with Claude and Anthropic Research