CVE-2026-57997: Strapi users-permissions - JWT Algorithm Confusion via Missing Algorithm Configuration
Medium · CVSS 4.8 (CVSS 3.1)EPSS 0.25%, 16th percentilePublished Updated Assigner: VulnCheck
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.
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N · CWE-327
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
strapi: strapi
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/strapi/strapi (opens in new tab)
- github.com/strapi/strapi/issues/26587 (opens in new tab)
- github.com/strapi/strapi/pull/26752 (opens in new tab)
- www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missi… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)