PatchTheCEVCVE-2026-113386: Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection
40
This month
HIGH 7.1
CVE-2026-113386 is a high-severity flaw (CVSS 7.1) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 38%) |
| CISA exploited list | No |
| Weakness | CWE-93 |
| Published | 2026-10-20 |
| Last modified | 2026-10-22 |
Publisher (CNA): MITRE
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source
sudo dnf upgrade --advisory=FEDORA-2026-0602a84203
Debian 12 · roundcube · NO FIX YET
Debian 13 · roundcube · FIXED · 1.6.20+dfsg-0+deb13u1
sudo apt update && sudo apt install --only-upgrade roundcube
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' roundcube)" ge "1.6.20+dfsg-0+deb13u1" && echo PATCHED || echo STILL-VULNERABLE
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.