roundcube: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were...
CVE-2026-74998 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-74998, released August 17, 2026. It is not reported as exploited. Patch Radar priority: High.
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were not validated, which may result in information disclosure or XSS (cross-site scripting) via MIME sniffing.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| roundcube · Debian 12.15 (bookworm) | 1.6.5+dfsg-1+deb12u11 | DEBIAN-CVE-2026-74998 | Aug 17, 2026 |
| roundcube · Debian 13.5 (trixie) | 1.6.18+dfsg-0+deb13u1 | DEBIAN-CVE-2026-74998 | Aug 17, 2026 |
| roundcube · Debian 14 | 1.6.18+dfsg-1 | DEBIAN-CVE-2026-74998 | Aug 17, 2026 |
| roundcubemail · opensuse-leap 16.0 | 1.6.20-bp160.1.1 | OPENSUSE-SU-2026:22195-1 | Nov 7, 2026 |
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