Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Apr 6, 2026 · NIST NVD

   Detected

   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.

2. Jul 24, 2026 · NIST NVD

   Updated

   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.

Affected

• cpe bulwarkmail/webmailversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-35389

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-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

  nvd.nist.gov

References

• Vendor Advisory · github.com