CVE-2026-8763
criticalIn Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI.
Vendor / product: Bouncycastle — bc-java
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).
CVSS
9.1
9.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-08-03 01:16
Modified: 2026-09-02 14:28
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
bouncycastle / bc-java <1.85
bouncycastle / bouncy_castle_for_java_lts ≤2.73.11
bouncycastle / fips_java_api ≥1.0.0 <1.0.2.7, ≥2.0.0 <2.0.2, ≥2.1.0 <2.1.3
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/bcgit/bc-java/commit/2c28b253a44681fbbc562561eab6ad383d2ae558
Patch / mitigation: https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%908763
References
- https://github.com/bcgit/bc-java/commit/2c28b253a44681fbbc562561eab6ad383d2ae558 91579145-5d7b-4cc5-b925-a0262ff19630
- https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%908763 91579145-5d7b-4cc5-b925-a0262ff19630
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗