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Description

In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which may lead to information disclosure or access-control bypass.

PUBLISHED Reserved 2026-05-25 | Published 2026-05-25 | Updated 2026-05-26 | Assigner mitre




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-669 Incorrect Resource Transfer Between Spheres

Product status

Default status
unaffected

1.6.0 (semver) before 1.6.16
affected

1.7.0 (semver) before 1.7.1
affected

References

roundcube.net/...026/05/24/security-updates-1.6.16-and-1.7.1

github.com/roundcube/roundcubemail/releases/tag/1.7.1

github.com/...ommit/59cca80908a61e662c5f81741449e9aeb91e8abe

github.com/roundcube/roundcubemail/releases/tag/1.6.16

github.com/...ommit/852350486b88b35b8544e8a630fad89e99e2150a

cve.org (CVE-2026-48846)

nvd.nist.gov (CVE-2026-48846)

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