Prototype pollution in OpenClaw - CVE-2026-27524
Published: May 1, 2026
Vulnerability identifier: #VU128837
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-27524
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote user to modify object prototype attributes.
The vulnerability exists due to improperly controlled modification of object prototype attributes in the runtime /debug set override handler when processing override object values containing prototype-reserved keys. A remote user can send a crafted override object to modify object prototype attributes.
The issue affects runtime in-memory overrides only and exploitation requires the /debug feature to be enabled.
How to mitigate CVE-2026-27524
Install security update from vendor's website.