Incorrect authorization in OpenClaw - CVE-2026-100538
Published: November 3, 2026
Vulnerability identifier: #VU158798
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100538
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose local file contents despite requester-specific filesystem read denials.
The vulnerability exists due to incorrect authorization in OpenClaw's outbound attachment handling when processing local file attachments without applying the originating sender's global or per-agent toolsBySender policy. A remote user can reference a host file through a final-response media directive or message attachment to retrieve its contents despite being denied access to the read tool.
Exploitation requires knowledge or derivation of a useful file path and a delivery flow that accepts local attachments.
Affected software
OpenClaw
How to mitigate CVE-2026-100538
Install security update from vendor's website.
OpenClaw - update to 2026.8.1