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CVE-2026-29000
Java vulnerability analysis and mitigation

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.


SourceNVD

Related Java vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-34361CRITICAL9.3
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NoYesMar 31, 2026
CVE-2026-34214HIGH7.7
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CVE-2026-34359HIGH7.4
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CVE-2026-34237MEDIUM6.1
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NoYesMar 31, 2026
CVE-2026-34360MEDIUM5.8
  • JavaJava
  • ca.uhn.hapi.fhir:org.hl7.fhir.core
NoYesMar 31, 2026

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