CVE-2026-27576 MEDIUM

CVE-2026-27576: OpenClaw: ACP prompt-size checks missing in local stdio bridge could reduce responsiveness with very large inputs

Vendor Openclaw
Product openclaw
Weakness CWE-400
Published February 21, 2026
Last update February 24, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

OpenClaw is a personal AI assistant. In versions 2026.2.17 and below, the ACP bridge accepts very large prompt text blocks and can assemble oversized prompt payloads before forwarding them to chat.send. Because ACP runs over local stdio, this mainly affects local ACP clients (for example IDE integrations) that send unusually large inputs. This issue has been fixed in version 2026.2.19.

Key dates

02Disclosure timeline

February 21, 2026 CVE published
February 24, 2026 Record updated