CVE Watch27 de out. de 2026

CVE-2026-113728

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.9.2, the unauthenticated POST /api/fetch-ical endpoint

CVSS

7.5

Alta

EPSS

0.5%

p44

KEV

—

Exploit Today

0-100

Publicado: 20 de out. de 2026 · Última mod.: 27 de out. de 2026 · CWE-918

EPSS · 30d

0.5%EPSS · 30 dias0.5%

2026-10-212026-11-07

Descrição técnica

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.

Referências oficiais

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