{"schema":"threatline.record/2","record":{"id":"CVE-2026-113728","aliases":["GHSA-24w9-8r42-8jwm"],"summary":"Bulwark Webmail: DNS-rebinding SSRF in public iCalendar fetch endpoint","details":"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.","categories":["Applications & CMS"],"product":"webmail","vendor":"bulwarkmail","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-113728","source_modified_at":"2026-10-20T21:12:38.182Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"webmail","vendor":"bulwarkmail","versions":[{"version":"< 1.9.2","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":7.5,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00507,"percentile":0.42401,"score_date":"2026-10-23"},"published_at":"2026-10-20T21:12:38.182Z","modified_at":"2026-10-20T21:12:38.182Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-113728","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T21:12:38.182Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-113728","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/bulwarkmail/webmail/security/advisories/GHSA-24w9-8r42-8jwm","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/bulwarkmail/webmail/commit/3288589e5248dcc1da769cc578827a9ee1adc941","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bulwarkmail/webmail/releases/tag/1.9.2","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-20T21:12:38.182Z","content_hash":"7a10de2b660935102181b547f41c85412a69d2bbedc6478f9ad9f1018b434b8a"}}