What’s Vulnerable › Vulnerabilities

CVE-2024-31033

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-01 · updated 2026-06-17

Description

JJWT (aka Java JWT) through 0.12.5 ignores certain characters and thus a user might falsely conclude that they have a strong key. The impacted code is the setSigningKey() method within the DefaultJwtParser class and the signWith() method within the DefaultJwtBuilder class. NOTE: the vendor disputes this because the "ignores" behavior cannot occur (in any version) unless there is a user error in how JJWT is used, and because the version that was actually tested must have been more than six years out of date.

Affected products

• Jwtk Jjwt: through 0.12.5

References

• https://github.com/2308652512/JJWT_BUG
• https://github.com/jwtk/jjwt
• https://github.com/jwtk/jjwt/issues/930#issuecomment-2032699358
• https://www.viralpatel.net/java-create-validate-jwt-token/
• https://github.com/2308652512/JJWT_BUG
• https://github.com/jwtk/jjwt
• https://github.com/jwtk/jjwt/issues/930#issuecomment-2032699358
• https://www.viralpatel.net/java-create-validate-jwt-token/

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