Answer in brief
CVE-2026-8763 records a Critical severity (CVSS 9.3) vulnerability in Bouncy Castle: Name Constraints bypass via trailing dot in rfc822Name and URI. The current sources do not mark it as known exploited. The current feed maps org.bouncycastle:bc-fips (maven), org.bouncycastle:bc-fips (maven), org.bouncycastle:bc-fips (maven), org.bouncycastle:bc-fips (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.bouncycastle:bc-fips (maven), org.bouncycastle:bc-fips (maven), org.bouncycastle:bc-fips (maven), org.bouncycastle:bc-fips (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| org.bouncycastle:bc-fipsmaven | <1.0.2.7 | 1.0.2.7 |
| org.bouncycastle:bc-fipsmaven | >=2.0.0,<2.0.2 | 2.0.2 |
| org.bouncycastle:bc-fipsmaven | >=2.1.0,<2.1.3 | 2.1.3 |
| org.bouncycastle:bc-fipsmaven | >=0 <1.0.2.7 | 1.0.2.7 |
| org.bouncycastle:bc-fipsmaven | >=2.0.0 <2.0.2 | 2.0.2 |
| org.bouncycastle:bc-fipsmaven | >=2.1.0 <2.1.3 | 2.1.3 |
| org.bouncycastle:bcprov-jdk15to18maven | <1.85 | 1.85 |
| org.bouncycastle:bcprov-jdk15to18maven | >=0 <1.85 | 1.85 |
| org.bouncycastle:bcprov-jdk18onmaven | <1.85 | 1.85 |
| org.bouncycastle:bcprov-jdk18onmaven | >=0 <1.85 | 1.85 |
| org.bouncycastle:bcprov-lts8onmaven | <2.73.12 | 2.73.12 |
| org.bouncycastle:bcprov-lts8onmaven | >=0 <2.73.12 | 2.73.12 |
Published upstream
Aug 3, 2026
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Sep 18, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Aug 3, 2026
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).
Quoted source text, attributed separately from HOL analysis.