high7.5
CVE-2026-35391
Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server.
Impact
Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP() function in lib/admin/session.ts trusted the first (leftmost) entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to bypass IP-based rate limiting (enabling brute-force attacks against the admin login) or forge audit log entries (making malicious activity appear to originate from arbitrary IP addresses). This vulnerability is fixed in 1.4.11.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Bulwarkmail | Webmail | before 1.4.11 |