# CVE-2026-48843: roundcube: Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS...

CVE-2026-48843 is fixed in roundcube on 1 platform, first by DEBIAN-CVE-2026-48843, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-48843
- Priority: High
- CVSS: 7.2 (high)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 25, 2026

## Description

Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has 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. The issue stems from an insufficient fix for CVE-2026-35540.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | roundcube Debian 12.15 (bookworm) | 1.6.5+dfsg-1+deb12u9 | [DEBIAN-CVE-2026-48843](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48843.md) | Jun 24, 2026 |
| Linux | roundcube Debian 13.5 (trixie) | 1.6.16+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-48843](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48843.md) | Jun 24, 2026 |
| Linux | roundcube Debian 14 | 1.6.16+dfsg-1 | [DEBIAN-CVE-2026-48843](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48843.md) | Jun 24, 2026 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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