by Kastro
Paper/Archive/CVE-2026-75003

CVE-2026-75003

Roundcube Webmail — In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url() in a FuncIRI attribute of an SVG image could evade the remot…

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 47.6.476 × 209.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url() in a FuncIRI attribute of an SVG image could evade the remote image blocking, which may lead to information disclosure or privilege escalation.

Affected

ProductAffectedFixed inSource
Webmail1.6.0 – < 1.6.181.6.18CNA
Webmail1.7.0 – < 1.7.31.7.3CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitre (CNA)5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refroundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3refgithub.com/roundcube/roundcubemail/releases/tag/1.6.18refgithub.com/roundcube/roundcubemail/commit/1cebea03474305d9f75a9a33d30880d290b5591brefgithub.com/roundcube/roundcubemail/releases/tag/1.7.3refgithub.com/roundcube/roundcubemail/commit/440277c32e6d84f3d116153af1cc8454361a8a56