CVE-2026-35390

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy (proxy.ts) set the Content-Security-Policy-Report-Only header instead of the enforcing Content-Security-Policy header. This means cross-site scripting (XSS) attacks were logged but not blocked. Any user who could inject script content (e.g., via crafted email HTML) could execute arbitrary JavaScript in the context of the application, potentially stealing session tokens or performing actions on behalf of the user. This vulnerability is fixed in 1.4.11.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/bulwarkmail/webmail/security/advisories/GHSA-6q52-98cr-qx65	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:bulwarkmail:webmail:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-06 21:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-35390

Mitre link : CVE-2026-35390

CVE.ORG link : CVE-2026-35390

JSON object : View

Products Affected

bulwarkmail

webmail

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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Cualquier usuario que pudiera inyectar contenido de script (por ejemplo, a trav\u00e9s de HTML de correo electr\u00f3nico manipulado) podr\u00eda ejecutar JavaScript arbitrario en el contexto de la aplicaci\u00f3n, potencialmente robando tokens de sesi\u00f3n o realizando acciones en nombre del usuario. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 1.4.11."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:bulwarkmail:webmail:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1011888E-0A3E-46C3-9234-45C7E75C0A31", "versionEndExcluding": "1.4.11"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}