Link following in OpenClaw - #VU128827
Published: May 1, 2026
Vulnerability identifier: #VU128827
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to write arbitrary files outside the intended extraction destination.
The vulnerability exists due to improper link resolution before file access in ZIP extraction logic in src/infra/archive.ts when extracting an attacker-controlled archive with a pre-existing symlink in the destination path. A remote attacker can supply a specially crafted archive to write arbitrary files outside the intended extraction destination.
Exploitation requires a pre-existing symlink under the extraction root in a destination path segment.
Affected software
OpenClaw
Remediation
Install security update from vendor's website.
OpenClaw - update to 2026.2.22