# CVE-2026-75006: roundcube: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets (CSS) sanitization in...

CVE-2026-75006 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-75006, released August 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-75006
- Priority: Routine
- CVSS: 5.8 (medium)
- EPSS: 0.0042
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 17, 2026

## Description

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | roundcube Debian 12.15 (bookworm) | 1.6.5+dfsg-1+deb12u11 | [DEBIAN-CVE-2026-75006](https://patchblox.com/security/data/fix/linux/debian-cve-2026-75006.md) | Aug 17, 2026 |
| Linux | roundcube Debian 13.5 (trixie) | 1.6.18+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-75006](https://patchblox.com/security/data/fix/linux/debian-cve-2026-75006.md) | Aug 17, 2026 |
| Linux | roundcube Debian 14 | 1.6.18+dfsg-1 | [DEBIAN-CVE-2026-75006](https://patchblox.com/security/data/fix/linux/debian-cve-2026-75006.md) | Aug 17, 2026 |
| Linux | roundcubemail opensuse-leap 16.0 | 1.6.20-bp160.1.1 | [OPENSUSE-SU-2026:22195-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22195-1.md) | Nov 7, 2026 |

---

Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.