Medium severity · published Aug 28, 2026
CVE-2026-9491
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
4.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Synology Chat Server · Synology
before 2.4.5-22148 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9491
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9491
www.synology.com
https://www.synology.com/en-global/security/advisory/Synology_SA_26_10
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