CVE-2026-113728: falha de alta gravidade em bulwarkmail webmail
Bulwark Webmail: DNS-rebinding SSRF in public iCalendar fetch endpoint
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.5epss 0.5%
Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.9.2, the unauthenticated POST /api/fetch-ical endpoint validates a caller-supplied hostname with one DNS lookup and then passes the URL to fetch, which performs a separate lookup for the socket connection. An attacker controlling authoritative DNS can return a public address during validation and then rebind the hostname to a loopback, private, link-local, or cloud metadata address for the connection, causing the server to return up to 10 MB of an internal HTTP or HTTPS response. The same check-then-fetch pattern also existed in authenticated JMAP login and TOTP token-exchange flows. This issue is fixed in version 1.9.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Produtos afetados
bulwarkmail · webmailCVEs relacionadas — bulwarkmail webmail
No mesmo produto, das mais perigosas para as menos.
CVE-2026-34834HIGHBulwark Webmail: Authentication Bypass in verifyIdentity() due to missing cookie validationEPSS 0.3%CVE-2026-35389HIGHBulwark Webmail S/MIME signature verification accepted self-signed certificatesEPSS 0.2%CVE-2026-35390MEDIUMContent-Security-Policy was set to Report-Only mode, failing to block XSS attacksEPSS 0.2%CVE-2026-34833HIGHBulwark Webmail: Information Exposure: password returned in /api/auth/sessionEPSS 0.2%CVE-2026-35391HIGHBulwark Webmail getClientIP() trusted client-controlled X-Forwarded-For value, enabling rate limit bypass and audit log forgeryEPSS 0.1%