Answer in brief
CVE-2026-29000 records a Critical severity (CVSS 9.3) vulnerability in pac4j-jwt JwtAuthenticator Authentication Bypass. The current sources do not mark it as known exploited. The current feed maps pac4j/pac4j-jwt (generic). 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 pac4j/pac4j-jwt (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| pac4j/pac4j-jwtgeneric | >=4.0 <4.5.9 || >=5.0 <5.7.9 || >=6.0 <6.3.3 | 4.5.9, 5.7.9, 6.3.3 |
Published upstream
Mar 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 8, 2026
pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attackers to forge authentication tokens. Attackers who possess the server's RSA public key can create a JWE-wrapped PlainJWT with arbitrary subject and role claims, bypassing signature verification to authenticate as any user including administrators.
Quoted source text, attributed separately from HOL analysis.