CVE-2026-8496

sogo: A cross-site scripting (XSS) vulnerability exists in Alinto SOGo, version 5.12.7

CVE-2026-8496 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-8496, released May 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
6.1
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0043
37th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
sogo · Debian 12.15 (bookworm) 5.8.0-2+deb12u3 DEBIAN-CVE-2026-8496 May 13, 2026
sogo · Debian 13.5 (trixie) 5.12.1-3+deb13u2 DEBIAN-CVE-2026-8496 May 13, 2026
sogo · Ubuntu 26.04.1 LTS (resolute) 5.12.4-1.2ubuntu0.1~esm1 sogo 5.12.4-1.2ubuntu0.1~esm1 May 18, 2026
sogo-activesync · Ubuntu 26.04.1 LTS (resolute) 5.12.4-1.2ubuntu0.1~esm1 sogo-activesync 5.12.4-1.2ubuntu0.1~esm1 May 18, 2026
sogo-common · Ubuntu 26.04.1 LTS (resolute) 5.12.4-1.2ubuntu0.1~esm1 sogo-common 5.12.4-1.2ubuntu0.1~esm1 May 18, 2026

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