CVE-2026-43534: OpenClaw < 2026.4.10 - Unsanitized External Input in Agent Hook Events

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-05 · updated 2026-06-17
Weakness: CWE-345

Description

OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.

Affected products

OpenClaw: before 2026.4.10 — fixed in 2026.4.10

How to fix

Upgrade to a fixed version: OpenClaw 2026.4.10. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/commit/e3a845bde5b54f4f1e742d0a51ba9860f9619b29
https://github.com/openclaw/openclaw/security/advisories/GHSA-7g8c-cfr3-vqqr
https://www.vulncheck.com/advisories/openclaw-unsanitized-external-input-in-agent-hook-events

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