CVE-2026-75004

MEDIUM CVSS 3.1: 4.3 EPSS 0.29%
Updated Aug 17, 2026
Roundcube
Parameter Value
CVSS 4.3 (MEDIUM)
Affected Versions 1.6.0 — 1.7.3
Fixed In 1.6.18
Type CWE-77 (Command Injection)
Vendor Roundcube
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Roundcube Webmail
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
1.6.0 1.6.18
Roundcube Webmail
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
1.7.0 1.7.3