CVE-2026-114730
High
Description
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”.
SeverityHigh
CVSS7.2
Exploit probability—
Product
Roundcube Webmail
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- roundcube webmail1.6.20, 1.7.5 or later
Patches
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| roundcube webmail | 1.6.14 ≤ v < 1.6.20, 1.7.0 ≤ v < 1.7.5 | 1.6.20, 1.7.5 |
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