CVE-2026-57997

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.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/strapi/strapi	Product
https://github.com/strapi/strapi/issues/26587	Issue Tracking
https://github.com/strapi/strapi/pull/26752	Issue Tracking Patch
https://www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missing-algorithm-configuration	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:strapi:strapi:*:*:*:*:*:node.js:*:*

History

30 Jun 2026, 20:17

Type	Values Removed	Values Added
CPE		cpe:2.3:a:strapi:strapi::::::node.js::*
First Time		Strapi Strapi strapi
References	~~() https://github.com/strapi/strapi -~~	() https://github.com/strapi/strapi - Product
References	~~() https://github.com/strapi/strapi/issues/26587 -~~	() https://github.com/strapi/strapi/issues/26587 - Issue Tracking
References	~~() https://github.com/strapi/strapi/pull/26752 -~~	() https://github.com/strapi/strapi/pull/26752 - Issue Tracking, Patch
References	~~() https://www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missing-algorithm-configuration -~~	() https://www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missing-algorithm-configuration - Patch, Third Party Advisory

29 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-29 22:16

Updated : 2026-07-01 15:17

NVD link : CVE-2026-57997

Mitre link : CVE-2026-57997

CVE.ORG link : CVE-2026-57997

JSON object : View

Products Affected

strapi

strapi

CWE

CWE-327

Use of a Broken or Risky Cryptographic Algorithm

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