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CVE-2026-114730 Details

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”.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugs.debian.org/1151279	[email protected]	Third Party AdvisoryMailing List
https://github.com/roundcube/roundcubemail/commit/3c3a65f66b53b7aaf3d720acd06e0b102eceb090	[email protected]	Patch
https://github.com/roundcube/roundcubemail/commit/6e1d480e730a45f29829b6a11af608d5d6eb3db6	[email protected]	Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.20	[email protected]	Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7.5	[email protected]	Release Notes
https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5	[email protected]	Release Notes

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
roundcube webmail	>= 1.6.14, < 1.6.20 >= 1.7.0, < 1.7.5
CPE cpe:2.3:a:roundcube:webmail:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Nov 4, 2026	Initial Analysis	[email protected]
Oct 28, 2026	CVE Modified	CISA-ADP
Oct 22, 2026	New CVE Received	[email protected]