Moderate severityNVD Advisory· Published Feb 21, 2026· Updated Feb 24, 2026
OpenClaw: ACP prompt-size checks missing in local stdio bridge could reduce responsiveness with very large inputs
CVE-2026-27576
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
openclawnpm | < 2026.2.19 | 2026.2.19 |
Affected products
2Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-cxpw-2g23-2vgwghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-27576ghsaADVISORY
- github.com/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4dd0b9cghsax_refsource_MISCWEB
- github.com/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d2ba68ghsax_refsource_MISCWEB
- github.com/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea8655654aghsax_refsource_MISCWEB
- github.com/openclaw/openclaw/releases/tag/v2026.2.19ghsax_refsource_MISCWEB
- github.com/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgwghsax_refsource_CONFIRMWEB
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