CVE-2026-114729
MEDIUM severity · CVSS 5.3 · CWE-184
5.3CVSS MEDIUM
Summary
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a remote content blocking bypass. rcube_washtml inspected the SVG SMIL animation attributes `to`, `from` and values for URIs, but not `by`; so markup such as in an HTML message caused remote content to be loaded without the user's consent, disclosing the client IP address and confirming that the message was opened. Upstream fixed this in the commit “Fix remote-content blocker bypass via SVG SMIL `by` attribute”.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactLow
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://github.com/roundcube/roundcubemail/commit/2b6ff79d8b14f94b0ff04765b7f02dbfdfe98efa ↗
Additional information
- NVD record
- https://github.com/roundcube/roundcubemail/commit/2b6ff79d8b14f94b0ff04765b7f02dbfdfe98efaPatch
- https://github.com/roundcube/roundcubemail/commit/96d993b4ac57166a094b5774f4761e0b905d9a05Patch
- https://bugs.debian.org/1151279Advisory
- 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