# CVE-2026-113386: roundcube: Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection

CVE-2026-113386 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-113386, released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-113386
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0100
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 20, 2026

## Description

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection. A remote authenticated attacker can exploit this via CRLF sequences injected into the _uid parameter of the mail/headers and mail/viewsource actions to execute arbitrary IMAP commands.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | roundcube Debian 13.5 (trixie) | 1.6.20+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-113386](https://patchblox.com/security/data/fix/linux/debian-cve-2026-113386.md) | Oct 24, 2026 |
| Linux | roundcube Debian 14 | 1.6.20+dfsg-1 | [DEBIAN-CVE-2026-113386](https://patchblox.com/security/data/fix/linux/debian-cve-2026-113386.md) | Oct 24, 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 2026-11-09T19:38:12Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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