| Component | OpenClaw |
| Severity | medium (CVSS 4) |
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Published (NVD) | 2026-02-21 |
| Last modified | 2026-06-17 |
| Affected versions | openclaw <= 2026.2.17 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-400 |
| CISA KEV | not listed |
NVD description
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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep OpenClaw off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-27576
- https://github.com/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgw
- https://github.com/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4dd0b9c
- https://github.com/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d2ba68
- https://github.com/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea8655654a
- https://github.com/openclaw/openclaw/releases/tag/v2026.2.19
Read more
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