CVE-2026-34834
HIGHBulwark Webmail: Authentication Bypass in verifyIdentity() due to missing cookie validation
Title source: cnaDescription
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 (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/bulwarkmail/webmail/security/advisories/GHSA-4356-876g-rfmh
X_Refsource_Misc x_refsource_misc
https://github.com/bulwarkmail/webmail/releases/tag/1.4.10
Scores
CVSS v3
7.5
EPSS
0.0025
EPSS Percentile
16.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-287
Status
published
Products (1)
bulwarkmail/webmail
< 1.4.10 (2 CPE variants)
Published
Apr 02, 2026
Tracked Since
Apr 03, 2026