Link following in OpenClaw - CVE-2026-27523
Published: May 1, 2026
Vulnerability identifier: #VU128778
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-27523
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenClaw
OpenClaw
Software vendor:
OpenClaw
OpenClaw
Description
The vulnerability allows a remote attacker to bypass sandbox path restrictions.
The vulnerability exists due to improper link resolution before file access in validateBindMounts when validating bind source paths that use a symlinked parent and a non-existent leaf path. A remote attacker can supply a crafted bind source path to bypass sandbox path restrictions.
The issue occurs because parent symlink traversal was not fully canonicalized before allowed-root and blocked-path checks.
Remediation
Install security update from vendor's website.