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I. Basic Information for CVE-2026-35389
Vulnerability Information

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Vulnerability Title
Bulwark Webmail S/MIME signature verification accepted self-signed certificates
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Bulwark Webmail 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bulwark Webmail是Bulwark Mail开源的一个自托管网页邮件客户端。 Bulwark Webmail 1.4.11之前版本存在信任管理问题漏洞,该漏洞源于S/MIME签名验证未检查证书信任链,可能导致显示无效签名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
bulwarkmailwebmail < 1.4.11 -
II. Public POCs for CVE-2026-35389
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III. Intelligence Information for CVE-2026-35389
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IV. Related Vulnerabilities
V. Comments for CVE-2026-35389

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