Vulnerability Details CVE-2026-35389
Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, S/MIME signature verification did not validate the certificate trust chain (checkChain: false). Any email signed with a self-signed or untrusted certificate was displayed as having a valid signature. This vulnerability is fixed in 1.4.11.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.3%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-35389
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cpe:2.3:a:bulwarkmail:webmail:*