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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/bulwarkmail/webmail/security/advisories/GHSA-v6w6-338p-p256	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:bulwarkmail:webmail:*:*:*:*:*:*:*:*

History

09 Apr 2026, 20:58

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
First Time		Bulwarkmail webmail Bulwarkmail
CPE		cpe:2.3:a:bulwarkmail:webmail::::::::
References	~~() https://github.com/bulwarkmail/webmail/security/advisories/GHSA-v6w6-338p-p256 -~~	() https://github.com/bulwarkmail/webmail/security/advisories/GHSA-v6w6-338p-p256 - Vendor Advisory

06 Apr 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-06 21:16

Updated : 2026-04-09 20:58

NVD link : CVE-2026-35389

Mitre link : CVE-2026-35389

CVE.ORG link : CVE-2026-35389

JSON object : View

Products Affected

bulwarkmail

webmail

CWE

CWE-295

Improper Certificate Validation

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