CVE-2026-57997 | Strapi users-permissions plugin fails to restrict JWT algori… | CVSS 4.8 MEDIUM

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.

Metadata

CVE ID: CVE-2026-57997
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-26 17:58 UTC
Published: 2026-06-29 21:16 UTC
Last updated: 2026-06-29 21:16 UTC
Primary CWE: CWE-327
CWE-327 Use of a Broken or Risky Cryptographic Algorithm
Vendor / Product: strapi / strapi
Sources: cve.org · NVD

Severity & Metrics

4.8 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products (1)

Vendor	Product	Platform	Versions
strapi	strapi	—	0 < 5.7.0

Weakness (CWE)

CWE	Source	Description
CWE-327	cna	CWE-327 Use of a Broken or Risky Cryptographic Algorithm

CVSS scores (2)

Score	Severity	Version	Source	Vector
6.3	MEDIUM	4.0	cna	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
4.8	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References (4)

https://github.com/strapi/strapi/issues/26587 https://github.com/strapi/strapi/issues/26587
https://github.com/strapi/strapi/pull/26752 https://github.com/strapi/strapi/pull/26752
https://github.com/strapi/strapi https://github.com/strapi/strapi
https://www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missing-algorithm-configuration