CVE-2026-57997CWE-327

Strapi users-permissions - JWT Algorithm Confusion via Missing Algorithm Configuration

Medium · published June 29, 2026

CVSS v4.0
6.3
EPSS
0%
Percentile
15.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
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
EPSS
0.00249 · 15.3th percentile
Weakness
CWE-327 · Use of a Broken or Risky Cryptographic Algorithm
Published
2026-06-29T21:16Z
EPSS history
Timeline
  • 29 JUN 21:16Z
    Strapi users-permissions - JWT Algorithm Confusion via Missing Algorithm Configuration
    cvelistv5