CVE-2026-105866: CWE-307: Improper Restriction of Excessive Authentication Attempts in payloadcms payload
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.
CVSS v4.0
Score 6.9medium
Affected software
payloadcms
payload
pkg:github/payloadcms/payloadRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Payload CMS, a headless content management system, suffers from improper restriction of excessive authentication attempts (CWE-307) in versions before 3.90.0 and canary versions before 4.0.0-canary.34. The vulnerability allows an unauthenticated attacker, knowing an account's email or username, to trigger the account lockout mechanism repeatedly, effectively preventing the legitimate user from signing in. This denial-of-service-like condition targets the authentication process. The issue is resolved in versions 3.90.0 and 4.0.0-canary.34.
Potential Impact
The vulnerability enables an unauthenticated attacker to lock out legitimate users by abusing the account lockout feature, causing denial of service for those users. There is no indication of privilege escalation, data disclosure, or remote code execution. The impact is limited to account accessibility disruption.
Mitigation Recommendations
Upgrade Payload CMS to version 3.90.0 or later, or to 4.0.0-canary.34 or later. These versions contain the official fix for this vulnerability. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-05T23:06:29.748Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac52a0a2cdf04f656c7686f
Added to database: 10/06/2026, 17:04:10 UTC
Last enriched: 10/06/2026, 17:18:43 UTC
Last updated: 10/06/2026, 18:57:27 UTC
Views: 15
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