Medium 4.8Published Feb 21, 2026

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

Updated under an hour ago (Oct 27, 2026, 12:23 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for openclaw

Exploited in the last 30 days

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.

CVSS: 4.8 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

openclaw openclaw openclaw:openclaw (from the name)	before 2026.2.19	CNA record
openclaw openclaw openclaw:openclaw	through 2026.2.17	NVD

References

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgw	x-refsource-confirm, vendor-advisory
https://github.com/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4dd0b9c	x-refsource-misc, patch
https://github.com/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d2ba68	x-refsource-misc, patch
https://github.com/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea8655654a	x-refsource-misc, patch
https://github.com/openclaw/openclaw/releases/tag/v2026.2.19	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.