AI agent vulnerability · OpenClaw

GHSA-x82f-27x3-q89c: OpenClaw's TOCTOU symlink race in writeFileWithinRoot could create or truncate files outside root boundaries

highCVSS 4.0 8.7

Summary A symlink-retarget TOCTOU race in writeFileWithinRoot could point an attacker-controlled path alias outside the configured root between resolution and write operations. Impact Affected versions could cause out-of-root write side effects (including file creation or truncation) before final boundary validation.

Published Mar 2, 2026

Affected packages

openclaw

Ecosystem: npm
Affected: < 2026.3.1
Fixed in: 2026.3.1
Check: npm ls openclaw

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Summary

A symlink-retarget TOCTOU race in writeFileWithinRoot could point an attacker-controlled path alias outside the configured root between resolution and write operations.

Impact

Affected versions could cause out-of-root write side effects (including file creation or truncation) before final boundary validation.

Fix

Root-scoped write flow now opens existing files without pre-truncation, creates missing files with exclusive create semantics, truncates only after post-open identity/boundary checks, and removes out-of-root artifacts when a race is detected.

Affected and Patched Versions

Affected: <= 2026.2.26
Patched: 2026.3.1

Credited to tdjackey.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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