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CVE-2026-54433
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).
10.0 CRITICALEPSS 0.37%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 10.0 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N |
| 7.2 | HIGH | 3.1mitre (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Details
- CVE ID
- CVE-2026-54433
- Status
- Analyzed
- Assigner (CNA)
- mitre
- Published
- Jul 14, 2026
- Last modified
- 2026-10-24 21:10 UTC
- Weaknesses
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
As published by the CNA in the CVE record.
RoundcubeWebmail2 version ranges
- 1.6.0 before 1.6.17
- 1.7.0 before 1.7.2