Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability in OpenClaw allows untrusted input to be processed as trusted system events. This can enable attackers to escalate their privileges by tricking the system into running their code in a higher-trust context.
- High impact if exploited.
- Affects systems processing external input.
Attack Path
How an attacker could exploit the issue
An unauthenticated attacker can exploit this flaw by sending specially crafted hook metadata to the application. This metadata will be processed as a trusted system event, allowing the attacker to inject malicious hook names that can execute commands or operations within a higher-trust agent context.
- Network access required.
- Hook registration endpoint.
- No authentication needed.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows an attacker to inject malicious hook names to escalate untrusted input into a higher-trust agent context. The problem lies in inadequate validation of external hook metadata, which is then enqueued as trusted system events. This could enable unauthorized actions or data access.
- Publicly exposed component.
- No KEV listing.
- No public exploit observed.
Operational Fix
Recommended remediation, mitigation, and detection steps
Prioritize blocking external hook metadata that is enqueued as trusted system events, as this can lead to unauthorized context escalation. Teams should focus on identifying systems processing untrusted input to prevent privilege escalation. Review logs for evidence of malicious hook names being used to exploit this vulnerability.
- Update OpenClaw to version 2026.4.10.
- Implement strict input validation on all hook metadata.
- Monitor for suspicious hook names or event queue anomalies.
