CVE-2026-53845 Overview
CVE-2026-53845 is a hook bypass vulnerability affecting OpenClaw versions prior to 2026.5.6. Skill commands routed through the affected dispatch path skip before-tool-call hook coverage, allowing attackers to bypass hook-based auditing and policy enforcement. The flaw is categorized under [CWE-693] (Protection Mechanism Failure) and carries a CVSS 4.0 score of 2.3.
Critical Impact
Authenticated attackers can route skill commands through the vulnerable dispatch path to evade before-tool-call hooks, defeating audit logging and policy enforcement controls that depend on those hooks.
Affected Products
- OpenClaw (node.js) versions prior to 2026.5.6
- OpenClaw 2026.5.6:beta1
- Deployments relying on before-tool-call hooks for policy enforcement
Discovery Timeline
- 2026-06-16 - CVE-2026-53845 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-53845
Vulnerability Analysis
The vulnerability resides in OpenClaw's command dispatch logic. OpenClaw exposes a hook mechanism that runs before tool calls, providing a control point for auditing, validation, and policy enforcement. Skill commands routed through one specific dispatch path bypass these before-tool-call hooks entirely.
This is a protection mechanism failure [CWE-693]. The hook framework executes as designed for standard dispatch paths but is not invoked for the affected skill command flow. As a result, security controls that administrators expect to apply uniformly are silently skipped for a subset of operations.
The practical impact is loss of visibility and enforcement integrity. Operations that should be logged, validated, or denied by hook policies execute without the hook ever running. The CVSS 4.0 vector indicates network-reachable exploitation with low privileges required and limited integrity impact.
Root Cause
The root cause is incomplete coverage in the dispatch layer. The skill command pathway does not invoke the same before-tool-call hook chain that other dispatch paths trigger, creating an inconsistent enforcement surface across the codebase.
Attack Vector
An attacker with low-privileged access to the OpenClaw instance crafts skill commands and submits them through the vulnerable dispatch path. Because the before-tool-call hook is skipped, any auditing, allow-listing, or policy denial logic registered through that hook is not consulted. The attack requires the presence of certain attack prerequisites (AT:P in the CVSS vector), reflecting that exploitation depends on specific dispatch routing conditions. Refer to the VulnCheck Advisory for technical details on the affected dispatch path.
Detection Methods for CVE-2026-53845
Indicators of Compromise
- Skill command invocations in application logs with no corresponding before-tool-call hook entry
- Tool-call activity that does not appear in audit trails generated by registered hooks
- Discrepancies between expected policy denials and observed command execution outcomes
Detection Strategies
- Reconcile tool-call execution records against hook execution logs and alert on mismatched events
- Inventory all OpenClaw deployments and confirm versions against the fixed release 2026.5.6
- Review skill command usage patterns for low-privileged accounts invoking sensitive tools
Monitoring Recommendations
- Forward OpenClaw application and hook logs to a centralized SIEM for correlation
- Build alerts for tool-call executions that lack matching pre-call hook telemetry
- Track command volumes per user account to surface anomalous skill command bursts
How to Mitigate CVE-2026-53845
Immediate Actions Required
- Upgrade OpenClaw to version 2026.5.6 or later, which restores hook coverage on the affected dispatch path
- Audit hook registrations and confirm that policy enforcement logic is reachable from all command pathways
- Restrict access to OpenClaw instances to trusted, authenticated users until patching completes
Patch Information
The vendor has released a fix in OpenClaw 2026.5.6. Patch details are documented in the GitHub Security Advisory GHSA-68xw-r643-9p5w. Administrators should validate the upgrade in a staging environment before rolling out to production.
Workarounds
- Disable or restrict skill command functionality if upgrading immediately is not feasible
- Implement compensating controls at the network or proxy layer to inspect and log tool calls independently of in-application hooks
- Reduce privileges for accounts that interact with OpenClaw to limit the scope of bypassed policy decisions
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
