Vulnerability · Published Feb 9, 2026 · Assigned by mitre
CVE-2026-25916
Medium 4.3
In plain English
A medium-severity security flaw 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 0.8% (higher than 55% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.8%top 44.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13, when "Block remote images" is used, does not block SVG feImage.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u7 | DEBIAN-CVE-2026-25916 |
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u7 | DSA-6137-1 |
| Debian:13 | roundcube | 1.6.13+dfsg-0+deb13u1 | DEBIAN-CVE-2026-25916 |
| Debian:13 | roundcube | 1.6.13+dfsg-0+deb13u1 | DSA-6137-1 |
| Debian:14 | roundcube | 1.6.13+dfsg-1 | DEBIAN-CVE-2026-25916 |
| Ubuntu:25.10 | roundcube | no fix listed | UBUNTU-CVE-2026-25916 |
| Ubuntu:26.10 | roundcube | no fix listed | UBUNTU-CVE-2026-25916 |
Affected products (as reported)
Weakness: CWE-420 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N