What’s Vulnerable › Vulnerabilities

CVE-2016-5431

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-07 · updated 2026-06-17
• Weakness: CWE-327

Description

The PHP JOSE Library by Gree Inc. before version 2.2.1 is vulnerable to key confusion/algorithm substitution in the JWS component resulting in bypassing the signature verification via crafted tokens.

Affected products

• jose-php: before 2.2.1 — fixed in 2.2.1

How to fix

Upgrade to a fixed version: jose-php 2.2.1. Check the vendor advisory for mitigations.

References

• https://github.com/nov/jose-php/commit/1cce55e27adf0274193eb1cd74b927a398a3df4b
• https://github.com/nov/jose-php/commit/1cce55e27adf0274193eb1cd74b927a398a3df4b

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