GitHub Advisoryadvisory · npm

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

HIGH Published 2026-03-02 Modified 2026-03-02 Official page ↗
Ecosystem
npm
Packages
openclaw
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Weaknesses
CWE-367, CWE-59
Reviewed
2026-03-02

Affected packages

• npm openclaw: < 2026.3.1 → fixed in 2026.3.1

Description

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`

Related

Weakness · CWE (2)

  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness
  • CWE-59 Improper Link Resolution Before File Access weakness

References