# CVE-2026-26079: roundcube: Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because co...

CVE-2026-26079 is fixed in 7 products on 1 platform, first by roundcube 1.3.6+dfsg.1-1ubuntu0.1~esm8, released February 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-26079
- Priority: Routine
- CVSS: 4.7 (medium)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 10, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | roundcube Debian 12.15 (bookworm) | 1.6.5+dfsg-1+deb12u7 | [DEBIAN-CVE-2026-26079](https://patchblox.com/security/data/fix/linux/debian-cve-2026-26079.md) | Feb 11, 2026 |
| Linux | roundcube Debian 13.5 (trixie) | 1.6.13+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-26079](https://patchblox.com/security/data/fix/linux/debian-cve-2026-26079.md) | Feb 11, 2026 |
| Linux | roundcube Debian 14 | 1.6.13+dfsg-1 | [DEBIAN-CVE-2026-26079](https://patchblox.com/security/data/fix/linux/debian-cve-2026-26079.md) | Feb 11, 2026 |
| Linux | roundcube Ubuntu 18.04.6 LTS (bionic) | 1.3.6+dfsg.1-1ubuntu0.1~esm8 | [roundcube 1.3.6+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-roundcube-1.3.6-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg.1-1ubuntu0.1~esm8 | [roundcube 1.4.3+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-roundcube-1.4.3-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube Ubuntu 22.04.1 LTS (jammy) | 1.5.0+dfsg.1-2ubuntu0.1~esm6 | [roundcube 1.5.0+dfsg.1-2ubuntu0.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-roundcube-1.5.0-dfsg.1-2ubuntu0.1-esm6.md) | Feb 10, 2026 |
| Linux | roundcube Ubuntu 24.04.5 LTS (noble) | 1.6.6+dfsg-2ubuntu0.1+esm3 | [roundcube 1.6.6+dfsg-2ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-roundcube-1.6.6-dfsg-2ubuntu0.1-esm3.md) | Feb 10, 2026 |
| Linux | roundcube-core Ubuntu 18.04.6 LTS (bionic) | 1.3.6+dfsg.1-1ubuntu0.1~esm8 | [roundcube-core 1.3.6+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-roundcube-core-1.3.6-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-core Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg.1-1ubuntu0.1~esm8 | [roundcube-core 1.4.3+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-roundcube-core-1.4.3-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-core Ubuntu 22.04.1 LTS (jammy) | 1.5.0+dfsg.1-2ubuntu0.1~esm6 | [roundcube-core 1.5.0+dfsg.1-2ubuntu0.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-roundcube-core-1.5.0-dfsg.1-2ubuntu0.1-esm6.md) | Feb 10, 2026 |
| Linux | roundcube-core Ubuntu 24.04.5 LTS (noble) | 1.6.6+dfsg-2ubuntu0.1+esm3 | [roundcube-core 1.6.6+dfsg-2ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-roundcube-core-1.6.6-dfsg-2ubuntu0.1-esm3.md) | Feb 10, 2026 |
| Linux | roundcube-mysql Ubuntu 18.04.6 LTS (bionic) | 1.3.6+dfsg.1-1ubuntu0.1~esm8 | [roundcube-mysql 1.3.6+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-roundcube-mysql-1.3.6-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-mysql Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg.1-1ubuntu0.1~esm8 | [roundcube-mysql 1.4.3+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-roundcube-mysql-1.4.3-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-mysql Ubuntu 22.04.1 LTS (jammy) | 1.5.0+dfsg.1-2ubuntu0.1~esm6 | [roundcube-mysql 1.5.0+dfsg.1-2ubuntu0.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-roundcube-mysql-1.5.0-dfsg.1-2ubuntu0.1-esm6.md) | Feb 10, 2026 |
| Linux | roundcube-mysql Ubuntu 24.04.5 LTS (noble) | 1.6.6+dfsg-2ubuntu0.1+esm3 | [roundcube-mysql 1.6.6+dfsg-2ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-roundcube-mysql-1.6.6-dfsg-2ubuntu0.1-esm3.md) | Feb 10, 2026 |
| Linux | roundcube-pgsql Ubuntu 18.04.6 LTS (bionic) | 1.3.6+dfsg.1-1ubuntu0.1~esm8 | [roundcube-pgsql 1.3.6+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-roundcube-pgsql-1.3.6-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-pgsql Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg.1-1ubuntu0.1~esm8 | [roundcube-pgsql 1.4.3+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-roundcube-pgsql-1.4.3-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-pgsql Ubuntu 22.04.1 LTS (jammy) | 1.5.0+dfsg.1-2ubuntu0.1~esm6 | [roundcube-pgsql 1.5.0+dfsg.1-2ubuntu0.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-roundcube-pgsql-1.5.0-dfsg.1-2ubuntu0.1-esm6.md) | Feb 10, 2026 |
| Linux | roundcube-pgsql Ubuntu 24.04.5 LTS (noble) | 1.6.6+dfsg-2ubuntu0.1+esm3 | [roundcube-pgsql 1.6.6+dfsg-2ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-roundcube-pgsql-1.6.6-dfsg-2ubuntu0.1-esm3.md) | Feb 10, 2026 |
| Linux | roundcube-plugins Ubuntu 18.04.6 LTS (bionic) | 1.3.6+dfsg.1-1ubuntu0.1~esm8 | [roundcube-plugins 1.3.6+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-roundcube-plugins-1.3.6-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-plugins Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg.1-1ubuntu0.1~esm8 | [roundcube-plugins 1.4.3+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-roundcube-plugins-1.4.3-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-plugins Ubuntu 22.04.1 LTS (jammy) | 1.5.0+dfsg.1-2ubuntu0.1~esm6 | [roundcube-plugins 1.5.0+dfsg.1-2ubuntu0.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-roundcube-plugins-1.5.0-dfsg.1-2ubuntu0.1-esm6.md) | Feb 10, 2026 |
| Linux | roundcube-plugins Ubuntu 24.04.5 LTS (noble) | 1.6.6+dfsg-2ubuntu0.1+esm3 | [roundcube-plugins 1.6.6+dfsg-2ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-roundcube-plugins-1.6.6-dfsg-2ubuntu0.1-esm3.md) | Feb 10, 2026 |
| Linux | roundcube-sqlite3 Ubuntu 18.04.6 LTS (bionic) | 1.3.6+dfsg.1-1ubuntu0.1~esm8 | [roundcube-sqlite3 1.3.6+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-roundcube-sqlite3-1.3.6-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-sqlite3 Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg.1-1ubuntu0.1~esm8 | [roundcube-sqlite3 1.4.3+dfsg.1-1ubuntu0.1~esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-roundcube-sqlite3-1.4.3-dfsg.1-1ubuntu0.1-esm8.md) | Feb 10, 2026 |
| Linux | roundcube-sqlite3 Ubuntu 22.04.1 LTS (jammy) | 1.5.0+dfsg.1-2ubuntu0.1~esm6 | [roundcube-sqlite3 1.5.0+dfsg.1-2ubuntu0.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-roundcube-sqlite3-1.5.0-dfsg.1-2ubuntu0.1-esm6.md) | Feb 10, 2026 |
| Linux | roundcube-sqlite3 Ubuntu 24.04.5 LTS (noble) | 1.6.6+dfsg-2ubuntu0.1+esm3 | [roundcube-sqlite3 1.6.6+dfsg-2ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-roundcube-sqlite3-1.6.6-dfsg-2ubuntu0.1-esm3.md) | Feb 10, 2026 |
| Linux | roundcubemail opensuse-leap 16.0 | 1.6.13-bp160.1.1 | [OPENSUSE-SU-2026:20323-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20323-1.md) | Mar 5, 2026 |

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Data as of 2026-11-09T01:18:40Z 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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