EUVD-2026-67462
GHSA-w5gw-c597-vxvj
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Network-reachable webhook requires authenticated session (PR:L); no integrity or availability impact; scope unchanged as SSRF yields only non-sensitive data.
Primary rating from Vendor (synology).
CVSS VectorVendor: synology
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Server-Side Request Forgery in Synology Chat Server's webhook functionality allows remote authenticated users to probe internal or external network resources and retrieve non-sensitive information. Affected versions are all Chat Server releases prior to 2.4.5-22148. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session with at least standard user privileges on the Synology Chat Server instance (CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 4.3 (Medium) accurately reflects the constrained impact: only confidentiality is affected (C:L), with no integrity or availability consequence, and scope is unchanged (S:U), confirming blast radius is limited to information the server can reach. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Synology Chat Server to version 2.4.5-22148 or later, as directed by Synology Security Advisory SA_26_10 (https://www.synology.com/en-global/security/advisory/Synology_SA_26_10). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
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