# CVE-2026-75004: roundcube: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could lead to managesieve_disab...

CVE-2026-75004 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-75004, released August 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-75004
- Priority: Routine
- CVSS: 4.3 (medium)
- EPSS: 0.0027
- 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, improper rule name quoting could lead to managesieve_disabled_actions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | roundcube Debian 12.15 (bookworm) | 1.6.5+dfsg-1+deb12u11 | [DEBIAN-CVE-2026-75004](https://patchblox.com/security/data/fix/linux/debian-cve-2026-75004.md) | Aug 17, 2026 |
| Linux | roundcube Debian 13.5 (trixie) | 1.6.18+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-75004](https://patchblox.com/security/data/fix/linux/debian-cve-2026-75004.md) | Aug 17, 2026 |
| Linux | roundcube Debian 14 | 1.6.18+dfsg-1 | [DEBIAN-CVE-2026-75004](https://patchblox.com/security/data/fix/linux/debian-cve-2026-75004.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 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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