Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M

CVE-2026-105854Payload: ReDoS in Multipart Content-Type Validation

High 8.7

In plain English

A high-severity uncontrolled resource consumption in payload from payloadcms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.4%top 70.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	payload	3.90.0	GHSA-2g7p-5934-q4w7
npm	payload	4.0.0-canary.34	GHSA-2g7p-5934-q4w7

Affected products (as reported)

Vendor	Product	Versions
payloadcms	payload	>= 3.0.0, < 3.90.0>= 4.0.0-canary.0, < 4.0.0-canary.34

Weakness: CWE-400, CWE-1333 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

https://github.com/payloadcms/payload/security/advisories/GHSA-2g7p-5934-q4w7 x_refsource_CONFIRM
https://github.com/payloadcms/payload/commit/0084bd51fb7742b26a88431bb84cb1696857e6dc x_refsource_MISC
https://github.com/payloadcms/payload/releases/tag/v3.90.0 x_refsource_MISC