Vulnerability · Published Aug 17, 2026 · Assigned by mitre
CVE-2026-75002
High 7.1
In plain English
A high-severity command injection in Webmail from Roundcube. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)1.4%top 28.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and LITERAL+ byte-count desynchronization could lead to information disclosure or privilege escalation via IMAP command injection.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u11 | DEBIAN-CVE-2026-75002 |
| Debian:13 | roundcube | 1.6.18+dfsg-0+deb13u1 | DEBIAN-CVE-2026-75002 |
| Debian:14 | roundcube | 1.6.18+dfsg-1 | DEBIAN-CVE-2026-75002 |
| Ubuntu:26.10 | roundcube | no fix listed | UBUNTU-CVE-2026-75002 |
Affected products (as reported)
Weakness: CWE-77 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
References
- https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
- https://github.com/roundcube/roundcubemail/commit/73233abe581b3b31cefd00041c7086c40e1793ea
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
- https://github.com/roundcube/roundcubemail/commit/404d43f1b0125319c3cf8c9e3df39074c0cb80ad