CVE-2026-8496
mediumpriority · track · 0EPSS 0.004 · 37 %ileEURUEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (11)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://github.com/Alinto/sogo/releasesPatchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-8496cnnvd
- https://github.com/Alinto/sogo/commit/67ce01ec2a1a7854d8e9f615dd65afb949043e86enisa_euvd
- https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.8enisa_euvd
- https://www.sogo.nu/news/2026/sogo-v5128-released.htmlenisa_euvd
- https://github.com/Alinto/sogo/commit/67ce01ec2a1a7854d8e9f615dd65afb949043e86nvd
- https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.8nvd
- https://www.kb.cert.org/vuls/id/487613nvd
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