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

February 20, 2026

  • Local ACP sessions may become less responsive when very large prompts are submitted
  • Larger-than-expected model usage/cost when oversized text is forwarded
  • No privilege escalation and no direct remote attack path in the default ACP model

References

  • github.com/advisories/GHSA-cxpw-2g23-2vgw
  • github.com/openclaw/openclaw
  • github.com/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4dd0b9c
  • github.com/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d2ba68
  • github.com/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea8655654a
  • github.com/openclaw/openclaw/releases/tag/v2026.2.19
  • github.com/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgw
  • nvd.nist.gov/vuln/detail/CVE-2026-27576

Code Behaviors & Features

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Affected versions

All versions before 2026.2.19

Fixed versions

  • 2026.2.19

Solution

Upgrade to version 2026.2.19 or above.

Impact 3.3 LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Learn more about CVSS

Weakness

  • CWE-400: Uncontrolled Resource Consumption

Source file

npm/openclaw/CVE-2026-27576.yml

Spotted a mistake? Edit the file on GitLab.

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