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CVE-2026-35391

Bulwark Webmail getClientIP() trusted client-controlled X-Forwarded-For value, enabling rate limit bypass and audit log forgery PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
bulwarkmail / webmailaffected < 1.4.11

CWE

CWE-348

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.