CVE-2026-48843

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Summary

CVECVE-2026-48843
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-25 20:16:36 UTC
Updated2026-05-26 19:26:42 UTC
DescriptionRoundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

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

EPSS: 0.000300000 probability, percentile 0.090260000 (date 2026-05-27)

Problem Types: CWE-918 | CWE-918 CWE-918 Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNACVSS7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Roundcube Webmail affected 1.6.14 1.6.16 semver Not specified
CNA Roundcube Webmail affected 1.7.0 1.7.1 semver Not specified

References

ReferenceSourceLinkTags
github.com/roundcube/roundcubemail/releases/tag/1.7.1 [email protected] github.com
github.com/roundcube/roundcubemail/commit/ab96c88bfd888866ec5e02190b1961... [email protected] github.com
github.com/roundcube/roundcubemail/commit/cb3fc9041e91640ba9ba49ee7b2147... [email protected] github.com
github.com/roundcube/roundcubemail/releases/tag/1.6.16 [email protected] github.com
roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1 [email protected] roundcube.net
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