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CVE-2026-113728

7.5 high SSVC exploitation: none Published
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 6

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 13:28
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-27 14:16
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 13:28
  4. StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:47
  5. StatusReceived → PublishedNVD modified 2026-10-20 21:12
  6. First seenCVSS 7.5NVD modified 2026-10-20 22:19

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3