CVE-2026-75004
Medium
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.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Roundcube Webmail
PublishedAug 17, 2026
First seenAug 17, 2026
Weakness typeCWE-77Command injection
How to fix
Update
- roundcube webmail1.6.18, 1.7.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| roundcube webmail | 1.6.0 ≤ v < 1.6.18, 1.7.0 ≤ v < 1.7.3 | 1.6.18, 1.7.3 |
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