Resource exhaustion in OpenClaw - CVE-2026-27164
Published: May 4, 2026
Vulnerability identifier: #VU129411
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-27164
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote attacker to cause increased resource consumption.
The vulnerability exists due to uncontrolled resource consumption in src/agents/pi-embedded-runner/run.ts when processing adversarial overflow inputs. A remote attacker can trigger repeated overflow recovery retries to cause increased resource consumption.
Successful tool-result truncation resets the overflow retry counter while truncation itself remains a one-shot action, which preserves eventual termination but amplifies bounded retry and cost cycles.
How to mitigate CVE-2026-27164
Install security update from vendor's website.