CVE catalog

CVE-2026-8496

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 SO

[CVE catalog]

Severity: Medium · CVSS 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published: May 13, 2026, 7:17:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.43% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	sogo	sid	`5.12.12-1`	fixed
Debian	sogo	trixie	`5.12.1-3+deb13u2`	fixed
Debian	sogo	trixie-security	`5.12.1-3+deb13u3`	fixed
Debian	sogo	bookworm	`5.8.0-2+deb12u3`	fixed
Debian	sogo	bookworm-security	`5.8.0-2+deb12u3`	fixed
Ubuntu	sogo	25.10	`5.11.2-4`	vulnerable
Ubuntu	sogo	25.10	`5.12.1-1`	vulnerable
Ubuntu	sogo	25.10	`5.12.1-1build2`	vulnerable
Ubuntu	sogo	25.10	`5.12.1-2`	vulnerable
Ubuntu	sogo	25.10	`5.12.1-3`	vulnerable
Ubuntu	sogo	pro	`5.12.1-3`	vulnerable
Ubuntu	sogo	pro	`5.12.4-1`	vulnerable
Ubuntu	sogo	pro	`5.12.4-1.1`	vulnerable
Ubuntu	sogo	pro	`5.12.4-1.2`	vulnerable
Ubuntu	sogo	pro	`5.12.4-1.2ubuntu0.1~esm1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	sogo	source	sid	`5.12.8-1`	not yet assigned	Not reported	Not reported
Debian	sogo	source	trixie	`5.12.1-3+deb13u2`	not yet assigned	Not reported	Not reported
Debian	sogo	source	bookworm	`5.8.0-2+deb12u3`	not yet assigned	Not reported	Not reported
Ubuntu	sogo	deb	pro	`5.12.4-1.2ubuntu0.1~esm1`	Not reported	UBUNTU-CVE-2026-8496	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[sogo]Fixed
Details (4)
- 5.8.0-2+deb12u3 · amd64 · bookworm
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · arm64 · bookworm
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · amd64 · bookworm-security
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · arm64 · bookworm-security
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
[sogo-activesync]Fixed
Source package: [sogo]
Details (4)
- 5.8.0-2+deb12u3 · amd64 · bookworm
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · arm64 · bookworm
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · amd64 · bookworm-security
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · arm64 · bookworm-security
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
[sogo-common]Fixed
Source package: [sogo]
Details (4)
- 5.8.0-2+deb12u3 · all · bookworm
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · all · bookworm
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · all · bookworm-security
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12
- 5.8.0-2+deb12u3 · all · bookworm-security
  Fixed · Fixed: 5.8.0-2+deb12u3
  nvd · sogo · debian · bookworm; nvd · sogo · debian · 12

[Debian 13 (Trixie)]

[sogo]Fixed
Details (5)
- 5.12.1-3+deb13u2 · amd64 · trixie
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · arm64 · trixie
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
[sogo-activesync]Fixed
Source package: [sogo]
Details (5)
- 5.12.1-3+deb13u2 · amd64 · trixie
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · arm64 · trixie
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
[sogo-common]Fixed
Source package: [sogo]
Details (5)
- 5.12.1-3+deb13u2 · all · trixie
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · all · trixie
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · all · trixie-security
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u2 · all · trixie-security · Historical version
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13
- 5.12.1-3+deb13u3 · all · trixie-security
  Fixed · Fixed: 5.12.1-3+deb13u2
  nvd · sogo · debian · 13

Observed: Oct 27, 2026, 7:34:40 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]