Allocation of Resources Without Limits or Throttling in nginx-ui - #VU157110
Published: October 22, 2026
Vulnerability identifier: #VU157110
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to exhaust server memory and cause a denial of service.
The vulnerability exists due to allocation of resources without limits in the MCP request-body buffering middleware in mcp/router.go when processing authenticated HTTP requests. A remote user can send an oversized request body to /mcp, causing io.ReadAll(c.Request.Body) to buffer it in memory before request classification and service-token scope checks, potentially exhausting memory and terminating the server process.
Affected software
nginx-ui
Remediation
Install security update from vendor's website.
nginx-ui - update to 2.6.0