Skip to content
OpenAdvisories
High · 8.7 CVE-2026-34834 EUVD-2026-18531

Bulwark Webmail: Authentication Bypass in verifyIdentity() due to missing cookie validation

Published Apr 2, 2026 · Updated Apr 3, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
bulwarkmail webmail < 1.4.10 —

References