CVE-2026-9491

Medium

Description

A server-ide request forgery (SSRF) vulnerability in webhook in Synology Chat Server before 2.4.5-22148 allows remote authenticated users to obtain non-sensitive information.

SeverityMedium

CVSS4.3

Exploit probability—

ProductSynology Chat Server

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

Synology Synology Chat Server2.4.5-22148 or later

Vendor advisories

synology.com/en-global/security/advisory/Synology_SA_26_10

Affected products

Product	Affected versions	Fixed in
Synology Synology Chat Server	v < 2.4.5-22148	2.4.5-22148

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