CVE-2026-74998

highpriority · track · 0EPSS 0.004 · 38 %ileDEEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.44% (38th) EPSS
CVSS 7.2 · high
Is it mine?
7 products
Check your exposure
Who says so?
3 sources
enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were not validated, which may result in information disclosure or XSS (cross-site scripting) via MIME sniffing.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.2
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.2

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · ENISA EU
v3.17.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · cve@mitre.org USexploitability 3.9 · impact 2.7
v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79US
03

affected products (7)

Products and version ranges known to be affected.

04

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-2880Roundcube Webmail: Mehrere SchwachstellenDeutsch2026-08-17csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Roundcube Webmail ausnutzen, um beliebigen Programmcode auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen oder Cross-Site-Scripting-Angriffe durchzuführen.

05

also known as (2)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

enisa_euvdcert_bundnvdNVDCVE.orgMITRE
published 2026-08-17modified 2026-09-01
07

references (10)

External citations — patches, advisories, analysis.

scry

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