8.7High
CVE-2026-35389Bulwark Webmail S/MIME signature verification accepted self-signed certificates
Description
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.
Weakness (CWE):
CWE-295
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| bulwarkmail | webmail | < 1.4.11 |
References and patches
CPE matches (NVD) (1)
cpe:2.3:a:bulwarkmail:webmail:*:*:*:*:*:*:*:*< 1.4.11