CVE-2026-27576

OpenClaw: ACP prompt-size check vulnerability affecting local stdio bridge. Affected in 2026.2.17 and earlier; oversized prompt blocks can be assembled and forwarded to chat.send, impacting local ACP clients (e.g., IDE integrations). Mitigation: upgrade to 2026.2.19 (patched release).

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

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...

Allocation of Resources Without Limits or Throttling

Overview openclaw is a 🦞 OpenClaw — Personal AI Assistant Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling due to missing prompt-size checks in the ACP local stdio bridge. An attacker can cause reduced responsiveness and increased resource...

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

Vulnerability The ACP bridge accepted very large prompt text blocks and could 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. Affected...