CVE-2026-9491: Server-Side Request Forgery (SSRF) in Synology Synology Chat Server
Description
CVE-2026-9491 is a server-side request forgery (SSRF) vulnerability in the webhook component of Synology Chat Server versions before 2.4.5-22148. It allows remote authenticated users to obtain non-sensitive information from the server. The vulnerability has a medium severity rating with a CVSS score of 4.3. No official patch or remediation guidance has been provided yet by the vendor.
CVSS v3.1
Score 4.3medium
Affected software
Synology
Synology Chat Server
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an SSRF flaw in the webhook functionality of Synology Chat Server prior to version 2.4.5-22148. Remote authenticated users can exploit this issue to make the server perform unintended requests, potentially exposing non-sensitive information. The CVSS vector indicates network attack vector, low attack complexity, required privileges, no user interaction, unchanged scope, limited confidentiality impact, and no integrity or availability impact.
Potential Impact
The impact is limited to disclosure of non-sensitive information. There is no indication of integrity or availability compromise. The vulnerability requires authenticated access, reducing the attack surface. No known exploits are reported in the wild.
Mitigation Recommendations
No official patch or remediation level has been published by Synology as of now. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated access to trusted users and monitor for suspicious activity related to webhook usage.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- synology
- Date Reserved
- 2026-05-25T02:03:55.583Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a913ad6acd9273b4992fa9c
Added to database: 08/28/2026, 07:37:58 UTC
Last enriched: 09/10/2026, 03:22:53 UTC
Last updated: 10/12/2026, 18:48:25 UTC
Views: 98
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