CVE-2026-57997 MEDIUM

CVE-2026-57997: Strapi users-permissions - JWT Algorithm Confusion via Missing Algorithm Configuration

Vendor Strapi
Product strapi
Weakness CWE-327 · Broken crypto
Published June 29, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 29, 2026 CVE published
June 30, 2026 Record updated