CVE-2026-29000: pac4j-jwt JwtAuthenticator Authentication Bypass
pac4j · pac4j-jwt
Vendor fix available · Affected: pac4j-jwt · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 93% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- pac4j · pac4j-jwtfrom 4.0 before 4.5.9; from 5.0 before 5.7.9; from 6.0 before 6.3.3
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- pac4j
- Published
- March 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-29000 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.