# CVE-2026-114726: roundcube: Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability in the Bo...

CVE-2026-114726 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-114726, released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-114726
- Priority: Routine
- CVSS: 5.8 (medium)
- EPSS: 0.0033
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 22, 2026

## Description

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability in the Bounce (resend) action. rcube_mime::decode_address_list() did not strip control characters from the decoded display name, so a received message whose From display-name carries CRLF sequences in an encoded word could inject arbitrary headers into the message emitted when the user bounces it. Upstream fixed this in the commit “Fix mail header injection via the From display-name in the Bounce (resend) action”.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | roundcube Debian 13.5 (trixie) | 1.6.20+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-114726](https://patchblox.com/security/data/fix/linux/debian-cve-2026-114726.md) | Oct 24, 2026 |
| Linux | roundcube Debian 14 | 1.6.20+dfsg-1 | [DEBIAN-CVE-2026-114726](https://patchblox.com/security/data/fix/linux/debian-cve-2026-114726.md) | Oct 24, 2026 |
| Linux | roundcubemail Fedora 43 | 1.6.20-1.fc43 | [FEDORA-2026-DB7E033531](https://patchblox.com/security/data/fix/linux/fedora-2026-db7e033531.md) | Nov 7, 2026 |

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Data as of 2026-11-10T07:50:38Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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