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”.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 7
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-28 02:18
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-28 03:17
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-22 02:09
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:45
- StatusReceived → PublishedNVD modified 2026-10-22 02:09
- StatusPublished → ReceivedNVD modified 2026-10-22 03:16
- First seenCVSS 7.2 · roundcubeNVD modified 2026-10-22 02:09
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 6
- https://bugs.debian.org/1151279
- https://github.com/roundcube/roundcubemail/commit/3c3a65f66b53b7aaf3d720acd06e0b102eceb090
- https://github.com/roundcube/roundcubemail/commit/6e1d480e730a45f29829b6a11af608d5d6eb3db6
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5