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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4d…
security-advisories@github.com
https://github.com/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d…
security-advisories@github.com
https://github.com/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea865…
security-advisories@github.com
https://github.com/openclaw/openclaw/releases/tag/v2026.2.19
security-advisories@github.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgw
security-advisories@github.com