In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could lead to managesieve_disabled_actions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4760-1 roundcube security update
Debian DSA Debian DSA DSA-6479-1 roundcube security update
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 17 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 17 Aug 2026 15:15:00 +0000

Type Values Removed Values Added
Title Improper Rule Name Quoting Allows managesieve Disabled Actions Bypass in Roundcube Webmail

Mon, 17 Aug 2026 13:15:00 +0000

Type Values Removed Values Added
Description In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could lead to managesieve_disabled_actions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin.
First Time appeared Roundcube
Roundcube webmail
Weaknesses CWE-77
CPEs cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Vendors & Products Roundcube
Roundcube webmail
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-17T14:37:04.784Z

Reserved: 2026-08-17T12:53:49.733Z

Link: CVE-2026-75004

cve-icon Vulnrichment

Updated: 2026-08-17T14:37:00.796Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-17T13:16:55.070

Modified: 2026-09-08T18:46:33.850

Link: CVE-2026-75004

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T15:00:08Z

Weaknesses