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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-8496

⇱ NVD - CVE-2026-8496

  1. Vulnerabilities

CVE-2026-8496 Detail

Not Scheduled

This CVE record is not being prioritized for NVD enrichment efforts due to resource or other concerns.

Description

A cross-site scripting (XSS) vulnerability exists in Alinto SOGo, version 5.12.7. A maliciously crafted ICS calendar invitation files allows arbitrary JavaScript execution within the authenticated SOGo webmail session. The issue occurs because SVG content embedded in the description field of an ICS file, with an onrepeat event handler, is insufficiently sanitized before being rendered in the webmail interface. A remote attacker can execute JavaScript in the victim's browser when the malicious calendar invite is viewed. Successful exploitation may allow mailbox access, email and contact theft, session hijacking, and other actions allowed by an authenticated user.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/Alinto/sogo/commit/67ce01ec2a1a7854d8e9f615dd65afb949043e86 CERT/CC
https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.8 CERT/CC
https://www.sogo.nu/news/2026/sogo-v5128-released.html CERT/CC

Weakness Enumeration

CWE-ID CWE Name Source

Change History

4 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 7:03:59 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-05-13T18:55:59.267006Z","id":"CVE-2026-8496","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by CERT/CC 6/17/2026 7:03:59 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"Alinto SOGo","product":"SOGo","versions":[{"version":"0","lessThan":"5.12.8","versionType":"custom","status":"affected"}]}]

CVE Modified by CISA-ADP 5/13/2026 3:17:30 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

New CVE Received from CERT/CC 5/13/2026 3:17:30 PM

Action Type Old Value New Value
Added Description 
A cross-site scripting (XSS) vulnerability exists in Alinto SOGo, version 5.12.7. A maliciously crafted ICS calendar invitation files allows arbitrary JavaScript execution within the authenticated SOGo webmail session. The issue occurs because SVG content embedded in the description field of an ICS file, with an onrepeat event handler, is insufficiently sanitized before being rendered in the webmail interface. A remote attacker can execute JavaScript in the victim's browser when the malicious calendar invite is viewed. Successful exploitation may allow mailbox access, email and contact theft, session hijacking, and other actions allowed by an authenticated user.
Added Reference 
https://github.com/Alinto/sogo/commit/67ce01ec2a1a7854d8e9f615dd65afb949043e86
Added Reference 
https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.8
Added Reference 
https://www.sogo.nu/news/2026/sogo-v5128-released.html

Quick Info

CVE Dictionary Entry:
CVE-2026-8496
NVD Published Date:
05/13/2026
NVD Last Modified:
06/17/2026
Source:
CERT/CC