Input validation error in OpenClaw - CVE-2026-27159
Published: May 4, 2026
Vulnerability identifier: #VU129409
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-27159
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause increased resource consumption.
The vulnerability exists due to improper input validation in the tts model directive handling when processing model-generated TTS directives. A remote attacker can influence a reply to include a crafted provider override directive to cause increased resource consumption.
Exploitation requires multiple TTS providers to be configured.
Affected software
OpenClaw
How to mitigate CVE-2026-27159
Install security update from vendor's website.
OpenClaw - update to 2026.2.21