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2.3

OpenClaw 2026.2.19 to 2026.3.30: Zalo Webhook Event Suppression

CVE-2026-41362 · published 6 months ago
Summary

If you use OpenClaw versions 2026.2.19 to 2026.3.30, an attacker can suppress important events from different accounts by matching specific event details. This could lead to missed notifications or delayed responses. Update to version 2026.3.31 or later to fix the issue.

Original advisory text
OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attac...
OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
2.3 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-668Exposure of Resource to Wrong Sphere
Timeline
Published28 Apr 2026
Updated3 Nov 2026
First seen28 Apr 2026
Sources
CVE-2026-41362 · NVD
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