CVE-2026-75004

4.3 mediumEPSS 0.4%

Medium (4.3) in roundcube webmail. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

4.3 medium

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
CWE: CWE-77
Published: 2026-08-17
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

Affected

roundcube:webmail

References

https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3

Check your stack JSON