critical9.1
CVE-2026-8763
In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.bouncycastle:bc-fips | < 1.0.2.7 | 1.0.2.7 |
| maven | org.bouncycastle:bcprov-jdk18on | < 1.85 | 1.85 |
| maven | org.bouncycastle:bcprov-lts8on | < 2.73.12 | 2.73.12 |
| maven | org.bouncycastle:bcprov-jdk15to18 | < 1.85 | 1.85 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Bouncycastle | Bc-Java | before 1.85 |
| Bouncycastle | Bouncy Castle For Java Lts | through 2.73.11 |
| Bouncycastle | Fips Java Api | from 1.0.0 before 1.0.2.7 from 2.0.0 before 2.0.2 from 2.1.0 before 2.1.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-9pwp-9qqc-pr26
- https://nvd.nist.gov/vuln/detail/CVE-2026-8763
- https://github.com/bcgit/bc-java/commit/2c28b253a44681fbbc562561eab6ad383d2ae558
- https://github.com/bcgit/bc-java/wiki/CVE-2026-8763
- https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%908763
- https://github.com/bcgit/bc-java/releases/tag/r1rv85v2