SB2026110986 - Server-Side Request Forgery (SSRF) in Group Office

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Main Vulnerability Database SB2026110986

SB2026110986 - Server-Side Request Forgery (SSRF) in Group Office

Published: November 9, 2026

Security Bulletin ID SB2026110986
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2026-63653)

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]


The vulnerability allows an authenticated low-privileged attacker to access internal HTTP(S) services through the Group Office server and disclose portions of their responses.

The vulnerability exists due to missing destination validation for the user-controlled URL passed to the bookmarks module's Bookmark/description JMAP action, available in default installations. An authenticated low-privileged attacker can submit an internal or loopback URL and retrieve titles or meta descriptions extracted from the fetched HTML response.


Remediation

Install update from vendor's website.

References