{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-113728", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-20T16:03:14.864Z", "datePublished": "2026-10-20T21:12:38.182Z", "dateUpdated": "2026-10-20T21:12:38.182Z"}, "containers": {"cna": {"title": "Bulwark Webmail: DNS-rebinding SSRF in public iCalendar fetch endpoint", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/bulwarkmail/webmail/security/advisories/GHSA-24w9-8r42-8jwm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/bulwarkmail/webmail/security/advisories/GHSA-24w9-8r42-8jwm"}, {"name": "https://github.com/bulwarkmail/webmail/commit/3288589e5248dcc1da769cc578827a9ee1adc941", "tags": ["x_refsource_MISC"], "url": "https://github.com/bulwarkmail/webmail/commit/3288589e5248dcc1da769cc578827a9ee1adc941"}, {"name": "https://github.com/bulwarkmail/webmail/releases/tag/1.9.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/bulwarkmail/webmail/releases/tag/1.9.2"}], "affected": [{"vendor": "bulwarkmail", "product": "webmail", "versions": [{"version": "< 1.9.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-20T21:12:38.182Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-24w9-8r42-8jwm", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "webmail", "vendor": "bulwarkmail", "versions": [{"status": "affected", "version": "< 1.9.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-113728", "lastModified": "2026-10-20T22:19:29.740", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-20T22:19:29.740", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/bulwarkmail/webmail/commit/3288589e5248dcc1da769cc578827a9ee1adc941"}, {"source": "security-advisories@github.com", "url": "https://github.com/bulwarkmail/webmail/releases/tag/1.9.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/bulwarkmail/webmail/security/advisories/GHSA-24w9-8r42-8jwm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}