Link following in OpenClaw - CVE-2026-31990
Published: April 8, 2026
Vulnerability identifier: #VU125118
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-31990
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote attacker to overwrite files outside the sandbox workspace.
The vulnerability exists due to improper link resolution before file access in stageSandboxMedia when handling inbound files during media staging. A remote attacker can place or leverage a symlink in the destination path to overwrite files outside the sandbox workspace.
The issue affects destination writes under media/inbound that follow symlinks outside the intended sandbox workspace boundary.
How to mitigate CVE-2026-31990
Install security update from vendor's website.