What is CVE-2026-27524?

CVE-2026-27524 is a medium-severity vulnerability in Openclaw, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 4.3/10. Published 2026-03-18.

How severe is CVE-2026-27524?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Prototype Pollution in Openclaw

CVE-2026-27524

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 m…

Vulnerability class: Prototype Pollution

EPSS: 0.000 (15.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Openclaw — versions 0

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

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

Frequently asked questions

What is CVE-2026-27524?: CVE-2026-27524 is a medium-severity vulnerability in Openclaw, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 4.3/10. Published 2026-03-18.
How severe is CVE-2026-27524?: Medium severity. CVSS v3 base score is 4.3 out of 10.