CVE-2026-74998

Published: Ago 17, 2026 Last Modified: Ago 17, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,2
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none

Description

AI Translation Available

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were not validated, which may result in information disclosure or XSS (cross-site scripting) via MIME sniffing.

79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Confidentiality Integrity Availability
Potential Impacts:
Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies: AI/ML, Web Based, Web Server
Likelihood of Exploit: High
View CWE Details
https://github.com/roundcube/roundcubemail/commit/62d33c8a0…
https://github.com/roundcube/roundcubemail/commit/62d33c8a0dc3fd0dd03984220dc97…
https://github.com/roundcube/roundcubemail/commit/a2334990c…
https://github.com/roundcube/roundcubemail/commit/a2334990c02f7cb77b1a8d6fa97fc…
https://github.com/roundcube/roundcubemail/releases/tag/1.6…
https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
https://github.com/roundcube/roundcubemail/releases/tag/1.7…
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
https://roundcube.net/news/2026/08/09/security-updates-1.6.…
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3