CVE-2026-26079

MEDIUM

Roundcube Webmail <1.5.13 & <1.6.13 - XSS

Title source: llm

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.

References (9)

[Various Sources] https://roundcube.net/news/2026/02/08/security-updates-1.6.13-and-1.5.13

[Patch] https://github.com/roundcube/roundcubemail/commit/1f4c3a5af5033747f9685a8a395dbd8228d19816

[Patch] https://github.com/roundcube/roundcubemail/commit/2b5625f1d2ef7e050fd1ae481b2a52dc35466447

[Patch] https://github.com/roundcube/roundcubemail/commit/53d75d5dfebef235a344d476b900c20c12d52b01

[Patch] https://github.com/roundcube/roundcubemail/commit/5a3315cce587e0be58335d11ff9a5571c90494a5

[Patch] https://github.com/roundcube/roundcubemail/commit/bf89cbaa5897d8ad62e8057d9a3f6babb90b7954

[Patch] https://github.com/roundcube/roundcubemail/commit/c15f5dbf093a497e19a749b20e7f8fb5a9c24cde

View Patch ZIP pw:eip

[Release Notes] https://github.com/roundcube/roundcubemail/releases/tag/1.5.13

[Release Notes] https://github.com/roundcube/roundcubemail/releases/tag/1.6.13

Scores

CVSS v3 4.7

EPSS 0.0008

EPSS Percentile 23.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Classification

CWE

CWE-829

Status draft

Timeline

Published Feb 11, 2026

Tracked Since Feb 18, 2026