CVE-2026-9491
Quick assessment
Affected
Synology Synology Chat Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Synology Chat Server 2.4.5-22148 之前的版本中，webhook 中存在一个服务器端请求伪造（SSRF）漏洞，该漏洞允许经过身份验证的远程用户获取非敏感信息。
Possible ATT&CK Techniques 1 AI
T1571 · Non-Standard Port
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I. Basic Information for CVE-2026-9491
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Synology | Synology Chat Server | * ~ 2.4.5-22148 | - |
|
II. Public POCs for CVE-2026-9491
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-9491 (1)
-
🔗 Synology_SA_26_10 | Synology Inc. vendor-advisory
Same Patch Batch · Synology · 2026-08-28 · 3 CVEs total
| CVE-2026-40541 | 9.0 CRITICAL | Synology Chat Server 2.4.5 前跨站脚本漏洞 |
| CVE-2026-9548 | 6.5 MEDIUM | Synology Chat Server 2.4.5前XSS及文件读写漏洞 |
IV. Related Vulnerabilities
Same weakness: CWE-918
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Wallabag 2.0至2.6.14 PDF导出SSRF
V. Comments for CVE-2026-9491
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