Vulnerability · Published Apr 3, 2026 · Assigned by mitre
CVE-2026-35538
Low 3.1
In plain English
A low-severity argument 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 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.1Low
Exploit odds (30 days)0.4%top 63.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsanitized IMAP SEARCH command arguments could lead to IMAP injection or CSRF bypass during mail search.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u8 | DEBIAN-CVE-2026-35538 |
| Debian:13 | roundcube | 1.6.15+dfsg-0+deb13u1 | DEBIAN-CVE-2026-35538 |
| Debian:14 | roundcube | 1.6.14+dfsg-1 | DEBIAN-CVE-2026-35538 |
| Packagist | roundcube/roundcubemail | 1.7-rc5 | GHSA-8jr8-v43g-5c57 |
| Ubuntu:25.10 | roundcube | no fix listed | UBUNTU-CVE-2026-35538 |
| Ubuntu:26.10 | roundcube | no fix listed | UBUNTU-CVE-2026-35538 |
Affected products (as reported)
Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
- https://github.com/roundcube/roundcubemail/commit/5fe8a69956a9683a4269f3ad2a68e18deebf8a15
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
- https://github.com/roundcube/roundcubemail/commit/b18a8fa8e81571914c0ff55d4e20edb459c6952c
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
- https://github.com/roundcube/roundcubemail/commit/7daf5aa9c190ccc75bb31672d8fee9938877fd64