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Fencer Intel
high 7.1

CVE-2026-113386 json

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection.

published 20d ago modified 18d ago also EUVD-2026-104794

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

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.

Patch / fix

  • Roundcube Webmail 1.6.20, 1.7.5
  • roundcube Debian 13 1.6.20+dfsg-0+deb13u1
  • roundcube Debian 14 1.6.20+dfsg-1

debian advisories DEBIAN-CVE-2026-113386

  • roundcubemail openSUSE Leap 16.0 1.6.20-bp160.1.1
  • roundcubemail openSUSE Tumbleweed 1.6.20-1.1

opensuse advisories openSUSE-SU-2026:22195-1openSUSE-SU-2026:12221-1

Is CVE-2026-113386 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-113386 updated cvss 7.1

roundcubemail: roundcubemail: Arbitrary IMAP command execution via CRLF injection in the _uid parameter

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18d ago

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Affected products

  • Roundcube Webmail

Classification

Weakness
  • CWE-93 Improper Neutralization of CRLF Sequences

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.