Read the docs
TI-2026-21968 Aliases CVE-2026-27576GHSA-cxpw-2g23-2vgw

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

Priority LOW 21CWE-400Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00185 8th percentileScored 2026-11-07
Fix Fixed openclaw (openclaw): 2026.2.19openclaw (npm): 2026.2.19

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenClawopenclawbefore 2026.2.192026.2.19Patch availableCNA
—openclaw (npm)before 2026.2.192026.2.19Patch availableGHSA-cxpw-2g23-2vgw
  • openclaw VendorOpenClaw Affected before 2026.2.19 Fixed in 2026.2.19 Patch available CNA
  • openclaw (npm) Vendor— Affected before 2026.2.19 Fixed in 2026.2.19 Patch available GHSA-cxpw-2g23-2vgw

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*up to 2026.2.17VulnerableOpenClaw
  • cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:* Versions up to 2026.2.17 Vulnerable ·OpenClaw

Remediation

  • Fix · CNA openclaw (openclaw) Fixed in 2026.2.19
  • Fix · GHSA-cxpw-2g23-2vgw openclaw (npm) Fixed in 2026.2.19 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27576
  2. 2026-10-03 Alias added: GHSA-cxpw-2g23-2vgw

References

Patch 3

Advisory 2

Other 2

  • TI-2026-25309 OpenClaw < 2026.3.28 Media Parsing Path Traversal to Arbitrary File Read CVSS 4.0HIGH 8.7
  • TI-2026-20394 Exposure of resource to wrong sphere in OpenClaw CVSS 3.1HIGH 8.8
  • TI-2026-27742 OpenClaw < 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installation CVSS 4.0HIGH 8.4
  • TI-2026-27766 OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing CVSS 4.0MEDIUM 6.9
  • TI-2026-07315 OpenClaw bluebubbles Webhook monitor.ts handleBlueBubblesWebhookRequest improper authentication CVSS 4.0MEDIUM 6.9
  • TI-2026-17789 OpenClaw < 2026.2.22 - Allowlist Bypass via Command Substitution in system.run CVSS 4.0HIGH 7.5
See all 574 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences