GHSA-x82f-27x3-q89c
OpenClaw's TOCTOU symlink race in writeFileWithinRoot could create or truncate files outside root boundaries
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
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
What each source reports
GitHub Advisories Score used
OpenClaw's TOCTOU symlink race in writeFileWithinRoot could create or truncate files outside root boundaries
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
- Record
GHSA-x82f-27x3-q89c- CVSS 4.0
- 8.7 High
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 - Weakness
- CWE-59, CWE-367
- Updated
- 2026-11-02
OSV
OpenClaw's TOCTOU symlink race in writeFileWithinRoot could create or truncate files outside root boundaries
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
- Record
GHSA-x82f-27x3-q89c- CVSS 4.0
- 8.7 High
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 - Weakness
- CWE-367, CWE-59
- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openclawnpm | before 2026.3.1 | 2026.3.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-x82f-27x3-q89c is a high vulnerability (CVSS 8.7) in openclaw, published March 2, 2026. No source lists public exploit code. Fixed in openclaw 2026.3.1.