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

21Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

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

Ciclo de vida

02 abr 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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

Produtos afetados

bulwarkmail · webmail

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Referências

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