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CVE-2026-8763Name Constraints bypass via trailing dot in rfc822Name and URI
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).
9.3 CRITICALEPSS 0.43%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.3 | CRITICAL | 4.0bcorg (CNA) | 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 |
| 9.1 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Details
- CVE ID
- CVE-2026-8763
- Status
- Analyzed
- Assigner (CNA)
- bcorg
- Published
- Aug 3, 2026
- Last modified
- 2026-10-05 01:16 UTC
- Weaknesses
- CWE-295 · Improper Certificate Validation
Affected Products
As published by the CNA in the CVE record.
Legion of the Bouncy Castle Inc.BC-JAVA1 version range
- before 1.85
Legion of the Bouncy Castle Inc.BC-LTS-JAVA1 version range
- 2.73.0 before 2.73.12
Legion of the Bouncy Castle Inc.BC-FJA3 version ranges
- 1.0.0 before 1.0.2.7
- 2.0.0 before 2.0.2
- 2.1.0 before 2.1.3