CVE-2026-35391
Bulwark Webmail getClientIP() trusted client-controlled X-Forwarded-For value, enabling rate limit bypass and audit log forgery
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
5th
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.
| CWE | CWE-348 |
| Vendor | bulwarkmail |
| Product | webmail |
| Published | Apr 6, 2026 |
| Last Updated | Apr 7, 2026 |
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Affected Versions
bulwarkmail / webmail
< 1.4.11