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CVE-2026-57997

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

Published: Jun 29, 2026Updated: Jul 1, 2026 Sources: CVE List NVDCWE-327
4.8MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 83.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-327

Affected Products

strapi
commercialaka @strapi/plugin-users-permissions
strapiOn-prem
Web & CMS Plugins / cms-core

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
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References

https://github.com/strapi/strapi
github.com
https://github.com/strapi/strapi/issues/26587
github.com
https://github.com/strapi/strapi/pull/26752
github.com
and 1 more references View all →

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