Report: Breaking: CVE-2026-35390 - Content-Security-Policy was set to Report-Only mode, failing to block XSS attacks

Report: Breaking: CVE-2026-35390 - Content-Security-Policy was set to Report-Only mode, failing to block XSS attacks

CVE ID :CVE-2026-35390 Published : April 6, 2026, 9:16 p.m. | 14 minutes ago 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. Severity: 5.3 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...

CVE Details

Severity
MEDIUM
Published
April 6, 2026
Impact: XSS