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🛡️ CVE-2026-27486 — openclaw

🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-283 OSV
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

OpenClaw: Process Safety - Unvalidated PID Kill via SIGKILL in Process Cleanup

Summary

OpenClaw CLI process cleanup used system-wide process enumeration and pattern matching to terminate processes without verifying they were owned by the current OpenClaw process. On shared hosts, unrelated processes could be terminated if they matched the pattern.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected: < 2026.2.14 (including the latest published version 2026.2.13)
  • Fixed: 2026.2.14 (planned next release)

Details

The CLI runner cleanup helpers could kill processes matched by command-line patterns without validating process ownership.

Fix

Process cleanup is now scoped to owned processes only by filtering to direct child PIDs of the current process (ppid == process.pid) before sending signals.

Hardening follow-ups:

  • Prefer graceful termination for resume cleanup (SIGTERM, then SIGKILL fallback).
  • Reduce false negatives from ps argv truncation by preferring wide output (ps -axww) with a fallback.
  • Tighten command-line token matching to avoid substring matches.

Fix Commit(s)

  • 6084d13b956119e3cf95daaf9a1cae1670ea3557
  • eb60e2e1b213740c3c587a7ba4dbf10da620ca66

Release Process Note

This advisory is pre-set with patched version 2026.2.14. After 2026.2.14 is published to npm, the remaining step should be to publish this advisory.

Thanks @aether-ai-agent for reporting.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Attack requirements: Present — the target has to be in a particular state for the attack to work.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-27486 is classified as CWE-283: Unverified Ownership. The product does not properly verify that a critical resource is owned by the proper entity.

Affected software

CVE-2026-27486 is recorded against 1 package.

  • openclaw

Timeline and source

Published on 18 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Other advisories for this package

openclaw has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-283: Unverified Ownership) in other software:

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H
CWE CWE-283
Public Exploit ✅ No
Source OSV
Published 2026-02-18
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
openclaw — —

Similar Threats

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