What is the CVSS score of CVE-2026-26079?

CVE-2026-26079 has a CVSS 3.1 base score of 4.7 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N. EPSS exploitation probability: 0.1%.

Which versions of Red Hat are affected by CVE-2026-26079?

Organizations using Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 should be aware of moderate risk from CVE-2026-26079 rated CVSS 4.7.. A patch is available.

How to fix or mitigate CVE-2026-26079?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Red Hat CVE-2026-26079

MEDIUM

Inclusion of Functionality from Untrusted Control Sphere (CWE-829)

2026-02-11 cve@mitre.org

RCE Red Hat Suse

4.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.7 MEDIUM

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

SUSE

MEDIUM

qualitative

Red Hat

4.7 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Patch released

Apr 10, 2026 - 08:30 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

CVE Published

Feb 11, 2026 - 05:16 nvd

MEDIUM 4.7

DescriptionCVE.org

Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because comments are mishandled.

AnalysisAI

Roundcube Webmail versions up to 1.5.13 is affected by inclusion of functionality from untrusted control sphere (CVSS 4.7).

Technical ContextAI

This vulnerability (CWE-829: Inclusion of Functionality from Untrusted Control Sphere) affects Roundcube Webmail. Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because comments are mishandled.