CVE-2026-34834

Description

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to version 1.4.10, the verifyIdentity() function contained logic that returned true if no session cookies were present. This allowed unauthenticated attackers to bypass security checks and access/modify user settings via the /api/settings endpoint by providing arbitrary headers. This issue has been patched in version 1.4.10.

References

• https://github.com/bulwarkmail/webmail/releases/tag/1.4.10
• https://github.com/bulwarkmail/webmail/security/advisories/GHSA-4356-876g-rfmh