roundcube: Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 is affected by a server-side request forgery filter bypass
CVE-2026-114730 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-114730, released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.
Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 is affected by a server-side request forgery filter bypass. The network blocklist used by rcube_utils::is_local_url() omitted the RFC 6052 NAT64 prefix 64:ff9b::/96, the RFC 8215 local-use NAT64 prefix 64:ff9b:1::/48 and the unspecified address ::/128, so URLs such as http://[64:ff9b::7f00:1]/ passed the filter and reached loopback, link-local and cloud metadata addresses. Upstream fixed this in the commit “Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96”.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| roundcube · Debian 13.5 (trixie) | 1.6.20+dfsg-0+deb13u1 | DEBIAN-CVE-2026-114730 | Oct 24, 2026 |
| roundcube · Debian 14 | 1.6.20+dfsg-1 | DEBIAN-CVE-2026-114730 | Oct 24, 2026 |
| roundcubemail · Fedora 43 | 1.6.20-1.fc43 | FEDORA-2026-DB7E033531 | Nov 7, 2026 |
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