CVE-2026-35635
Received Received - Intake
Webhook Route Replacement Vulnerability in OpenClaw Synology Chat Extension

Publication date: 2026-04-09

Last updated on: 2026-04-15

Assigner: VulnCheck

Description
OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.
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Meta Information
Published
2026-04-09
Last Modified
2026-04-15
Generated
2026-06-16
AI Q&A
2026-04-10
EPSS Evaluated
2026-06-14
NVD
CVE-2026-35635
EUVD
EUVD-2026-21126
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.3.22 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-706 The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.
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Executive Summary

This vulnerability exists in OpenClaw before version 2026.3.22 within the Synology Chat extension. It involves a webhook path route replacement issue that allows attackers to collapse multiple account configurations onto shared webhook paths.

By exploiting inherited or duplicate webhook paths, attackers can bypass direct message access control policies that are meant to be enforced per account. This means attackers can replace route ownership across different accounts, potentially gaining unauthorized access or control.

Impact Analysis

The vulnerability can impact you by allowing attackers to bypass access controls on direct messages within Synology Chat. This could lead to unauthorized access to private communications or data across multiple accounts.

Because attackers can replace route ownership across accounts, they might manipulate or intercept messages intended for other users, potentially compromising confidentiality and integrity of communications.

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