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    CVE-2026-35391

    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.

    Published:Apr 6, 2026
    Last Modified:Apr 10, 2026
    EPS:Apr 6, 2026
    EPSS Score:0.00019
    CVSS Score:7.5

    Affected Products

    Vendor
    Bulwarkmail
    Product
    Webmail

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-348 Use of Less Trusted Source

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High