CVE-2026-57997: Strapi users-permissions plugin fails to restrict JWT algorithms when plugin::users-permissions.jwt.algorithm

Routine

MEDIUM 4.8REMOTEUPGRADE

CVE-2026-57997 is a medium-severity flaw (CVSS 4.8) affecting strapi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-327
Published	2026-06-29
Last modified	2026-10-25

Publisher (CNA): VulnCheck · Vendor: strapi

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-29 22:16 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

strapi strapi UPGRADE

Affected: < 5.7.0

Fixed in: 5.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls strapi

2. UPGRADE to 5.7.0

npm install strapi@">=5.7.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-57997?

strapi: upgrade to 5.7.0. Exact commands for each OS are on this page.

Is CVE-2026-57997 being exploited?

CVE-2026-57997 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-57997 affect?

CVE-2026-57997 affects strapi. Severity is medium (CVSS 4.8). 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 ca

How urgent is CVE-2026-57997?

Priority 26/100. Remotely exploitable, no login, no user action

Software pages

Strapi vulnerabilities

Related CVEs

CVE-2023-22894 MEDIUM 4.9 EXPLOITED UPGRADE Strapi Cleartext Storage of Sensitive Information Vulnerability

References

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