OpenClaw < 2026.3.22 - Webhook Reply Rebinding via Username Resolution in Synology Chat | Advisories

Advisories

OpenClaw < 2026.3.22 - Webhook Reply Rebinding via Username Resolution in Synology Chat

severity: medium
date: 4/10/2026
Affecting: OpenClaw < 2026.3.22
CVE: CVE-2026-35670
CWE: CWE-807 Reliance on Untrusted Inputs in a Security Decision
CVSS: 6
CVSS V4 Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
References: GitHub Security Advisory (GHSA-wv46-v6xc-2qhf)
Patch Commit #1
Patch Commit #2
Credit: Nathan (@nexrin), KeenSecurityLab
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.

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