What’s Vulnerable › Vulnerabilities

CVE-2026-35670: OpenClaw < 2026.3.22 - Webhook Reply Rebinding via Username Resolution in Synology Chat

• Severity: high (CVSS 8.1 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: 2026-04-10 · updated 2026-06-17
• Weakness: CWE-807

Description

OpenClaw before 2026.3.22 contains a webhook reply delivery vulnerability that allows attackers to rebind chat replies to unintended users by exploiting mutable username matching instead of stable numeric user identifiers. Attackers can manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.

Affected products

• OpenClaw: before 2026.3.22 — fixed in 2026.3.22

How to fix

Upgrade to a fixed version: OpenClaw 2026.3.22. Check the vendor advisory for mitigations.

References

• https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87
• https://github.com/openclaw/openclaw/commit/7ade3553b74ee3f461c4acd216653d5ba411f455
• https://github.com/openclaw/openclaw/security/advisories/GHSA-wv46-v6xc-2qhf
• https://www.vulncheck.com/advisories/openclaw-webhook-reply-rebinding-via-username-resolution-in-synology-chat

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