CVE-2026-26079

Publication date 11 February 2026

Last updated 29 April 2026

Ubuntu priority

Cvss 3 Severity Score

Description

Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because comments are mishandled.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
roundcube	26.04 LTS resolute	Vulnerable
	25.10 questing	Vulnerable
	24.04 LTS noble	Fixed 1.6.6+dfsg-2ubuntu0.1+esm3
	22.04 LTS jammy	Fixed 1.5.0+dfsg.1-2ubuntu0.1~esm6
	20.04 LTS focal	Fixed 1.4.3+dfsg.1-1ubuntu0.1~esm8
	18.04 LTS bionic	Fixed 1.3.6+dfsg.1-1ubuntu0.1~esm8
	16.04 LTS xenial	Fixed 1.2~beta+dfsg.1-0ubuntu1+esm8

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Severity score breakdown

Parameter	Value
Base score	4.7 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Changed
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-8223-1
Roundcube Webmail vulnerabilities
29 April 2026