Roundcube Webmail fixes multiple vulnerabilities

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[TLP:CLEAR] Roundcube Webmail fixes multiple vulnerabilities

Roundcube fixes multiple vulnerabilities in Roundcube Webmail in versions 1.7.5 and 1.6.20 [1], 1 of which has a published CVE and is described below [2].

Roundcube - command injection (CVE-2026-113386)

CVSS 7.1 (High)

Allows an authenticated remote attacker, by injecting CRLF characters into the request during the actions for displaying email headers or source code, to execute IMAP commands within their session [2].

The vulnerability is present in product:

Roundcube Webmail; >=1.6.0, <1.6.20; >=1.7.0, <1.7.5;

CVSS: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

More information:

CVE-2026-113386 at cve.org, NVD
CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') at cwe.mitre.org

The vulnerability was publicly disclosed 20. 10. 2026.

Links

By CESNET, z.s.p.o. Ondrej Pavlovič on 20. 10. 2026.

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[TLP:CLEAR] Roundcube Webmail fixes multiple vulnerabilities

Roundcube - command injection (CVE-2026-113386)

CVSS 7.1 (High)

Links