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

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-18 · updated 2026-06-17
Weakness: CWE-1321

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 products

OpenClaw: before 2026.2.21 — fixed in 2026.2.21

How to fix

Upgrade to a fixed version: OpenClaw 2026.2.21. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/commit/fbb79d4013000552d6a2c23b9613d8b3cb92f6b6
https://github.com/openclaw/openclaw/security/advisories/GHSA-62f6-mrcj-v8h5
https://www.vulncheck.com/advisories/openclaw-prototype-pollution-via-debug-override-path

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