VULNERABILITY INTELLIGENCE

CVE-2026-35390

CVSS score5.4 MEDIUM
EPSS probability0.17%
CISA KEVNot currently listed
Published2026-04-06
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references