Vulnerability · Published Mar 18, 2026 · Assigned by VulnCheck

CVE-2026-27524OpenClaw < 2026.2.21 - Prototype Pollution via Debug Override Path

Medium 4.3

In plain English

A medium-severity prototype pollution in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 83.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

OpenClaw versions prior to 2026.2.21 accept prototype-reserved keys in runtime /debug set override object values, allowing prototype pollution attacks. Authorized /debug set callers can inject __proto__, constructor, or prototype keys to manipulate object prototypes and bypass command gate restrictions.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	openclaw	2026.2.21	GHSA-62f6-mrcj-v8h5

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	OpenClaw	0 – before 2026.2.21

Weakness: CWE-1321 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

GitHub Security Advisory (GHSA-62f6-mrcj-v8h5) vendor-advisory
Patch Commit patch
VulnCheck Advisory: OpenClaw < 2026.2.21 - Prototype Pollution via Debug Override Path third-party-advisory