What’s Vulnerable › Vulnerabilities

CVE-2023-51774

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-02-29 · updated 2026-06-17
• Weakness: CWE-284

Description

The json-jwt (aka JSON::JWT) gem 1.16.3 for Ruby sometimes allows bypass of identity checks via a sign/encryption confusion attack. For example, JWE can sometimes be used to bypass JSON::JWT.decode.

Affected products

• Json-Jwt Project Json-Jwt: 1.16.3

References

• https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md
• https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md

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