CVE-2026-8763
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber
Summary
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).
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA | 0 < 1.85 | affected |
| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA | 2.73.0 < 2.73.12 | affected |
| Legion of the Bouncy Castle Inc. | BC-FJA | 1.0.0 < 1.0.2.7 | affected |
| Legion of the Bouncy Castle Inc. | BC-FJA | 2.0.0 < 2.0.2 | affected |
| Legion of the Bouncy Castle Inc. | BC-FJA | 2.1.0 < 2.1.3 | affected |
Weaknesses
- CWE-295: CWE-295 Improper Certificate Validation
References
- https://github.com/bcgit/bc-java/wiki/CVE-2026-8763
- https://github.com/bcgit/bc-java/commit/2c28b253a44681fbbc562561eab6ad383d2ae558
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