CVE-2026-8763

UNKNOWN 0.0

Name Constraints bypass via trailing dot in rfc822Name and URI

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

CWE	CWE-295
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 < 1.0.2.7 2.0.0 < 2.0.2 2.1.0 < 2.1.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/bcgit/bc-java/wiki/CVE-2026-8763 github.com: https://github.com/bcgit/bc-java/commit/2c28b253a44681fbbc562561eab6ad383d2ae558

Credits

🔍 Alex Gaynor in collaboration with Claude and Anthropic Research