CVE-2026-34834

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

CVSS 8.7 HIGHEPSS 0.3%CWE-287

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 8.7EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

02 abr 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Productos afectados

bulwarkmail · webmail

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Referencias

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