CVE-2026-100555: Openclaw

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

OpenClaw is an npm-distributed gateway application. In versions >= 2026.7.1 and < 2026.8.1, Synology Chat attachment delivery could lose DNS pinning: the Gateway validated a single DNS result for a supplied file URL but then passed the original hostname to the Synology NAS, where it could resolve to a different destination. When attachment delivery accepted a remotely influenced hostname, an attacker could use DNS rebinding to make the NAS fetch a private or otherwise policy-denied resource and return its contents to the addressed conversation (server-side request forgery). Practical impact depends on NAS routing, resolver behavior, and the response available at the private destination. The issue is fixed in 2026.8.1; as a workaround, disable remote URL attachment forwarding in Synology Chat.

Affected products

• Openclaw Openclaw: from 2026.7.1, before 2026.8.1 (fixed in 2026.8.1)

Published 2026-09-26. Last modified 2026-10-05.