Resource exhaustion in Openclaw
CVE-2026-27576
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (6.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Openclaw — versions < 2026.2.19
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgw (Vendor Advisory)
- github.com/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4dd0b9c (Patch)
- github.com/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d2ba68 (Patch)
- github.com/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea8655654a (Patch)
- github.com/openclaw/openclaw/releases/tag/v2026.2.19 (Release Notes)
Frequently asked questions
- What is CVE-2026-27576?
- CVE-2026-27576 is a medium-severity vulnerability in Openclaw, classified under Uncontrolled Resource Consumption. CVSS score: 4.0/10. Published 2026-02-21.
- How severe is CVE-2026-27576?
- Medium severity. CVSS v3 base score is 4.0 out of 10.