CVE-2026-127145

MEDIUM 4.3

SOGo before 5.12.13 SSRF via Web Calendar Subscriptions

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

SOGo before 5.12.13 contains a server-side request forgery vulnerability that allows authenticated users to make the server connect to arbitrary internal host:port destinations by supplying a user-controlled URL to the Calendar/addWebCalendar endpoint. Attackers can trigger a reload of the subscribed web calendar via the reload endpoint and distinguish response outcomes such as connection failures, timeouts, authentication prompts, or invalid content to probe the internal network from the server's position.

CWE	CWE-918
Vendor	alinto
Product	sogo
Published	Nov 12, 2026
Last Updated	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

Alinto / sogo

0 < 5.12.13

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.13 vulncheck.com: https://www.vulncheck.com/advisories/sogo-before-ssrf-via-web-calendar-subscriptions

Credits

Richard Olszynský