CVE-2026-105866: Brute Force

Description

Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, an unauthenticated attacker who knows an account email address or username can abuse the account lockout mechanism of a local-authentication collection to prevent that account from signing in. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

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Weakness Type (CWE)

CWE-307 CWE-307

CWE-645 CWE-645

References

Other References

https://github.com/payloadcms/payload/commit/1c46204a73a0a9f988a80c52690eee5a4ada3cf1 https://github.com/payloadcms/payload/releases/tag/v3.90.0 https://github.com/payloadcms/payload/security/advisories/GHSA-v5gf-vpjc-pc7w

Frequently Asked Questions

What is CVE-2026-105866? +

Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, an unauthenticated attacker who knows an account email address or username can abuse the account lockout mechanism of a local-authentication collection to prevent that account from signing in. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

How do I check if I'm vulnerable to CVE-2026-105866? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-105866