CVE-2026-105854: CWE-400: Uncontrolled Resource Consumption in payloadcms payload
Description
Payload is a free and open source headless content management system. In versions from 3.0.0 before 3.90.0 and canary versions before 4.0.0-canary.34, a malformed multipart request body can cause multipart Content-Type processing to take an extremely long time, resulting in uncontrolled resource consumption. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
CVSS v4.0
Score 8.7high
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
PayloadCMS, a headless content management system, has a CWE-400 (Uncontrolled Resource Consumption) vulnerability identified as CVE-2026-105854. In affected versions, processing a malformed multipart request body can cause the multipart Content-Type handler to take an extremely long time, leading to excessive resource consumption. This vulnerability affects versions >=3.0.0 <3.90.0 and >=4.0.0-canary.0 <4.0.0-canary.34. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity, with network attack vector, low complexity, no privileges or user interaction required, and high impact on availability. The issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
Potential Impact
An attacker can send a specially crafted malformed multipart request that causes the server to consume excessive resources during Content-Type processing. This can degrade service availability or cause denial of service. There is no indication of confidentiality or integrity impact. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade PayloadCMS 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 required once upgraded.
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: 6ac526892cdf04f656c62a34
Added to database: 10/06/2026, 16:49:13 UTC
Last enriched: 10/06/2026, 17:03:52 UTC
Last updated: 10/06/2026, 21:42:10 UTC
Views: 12
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