Vulnerability · Published Jun 29, 2026 · Assigned by VulnCheck
CVE-2026-57997Strapi users-permissions - JWT Algorithm Confusion via Missing Algorithm Configuration
Medium 4.8
In plain English
A medium-severity broken cryptography in strapi from strapi. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.2%top 83.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Strapi users-permissions plugin fails to restrict JWT algorithms when plugin::users-permissions.jwt.algorithm is not explicitly configured, allowing acceptance of HS384 and HS512 tokens alongside HS256. Attackers possessing the jwtSecret can mint tokens with non-standard HMAC variants to bypass algorithm restrictions and weaken authentication controls.
Affected products (as reported)
Weakness: CWE-327 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
References
- Pull Issue issue-tracking
- Pull Issue issue-tracking
- Product Details product
- https://www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missing-algorithm-configuration third-party-advisory