{"id":"CVE-2026-33586","revision":null,"records":[{"revision":"a4fc7dc60ceb4b7ea44e203f6e83fadd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-33586","aliases":[],"title":"Authenticated SMTP Sender Address Forgery","description":"Authenticated users are able to manipulate both the SMTP\nenvelope “Envelope-from” and “From” fields when sending\nemails through OVH mail servers.\n\n\n\nDue to OVH's default SPF configuration, which\ncommonly includes include:mx.ovh.com, any authenticated user with a\nvalid OVH email account can send messages that appear to originate from any\nOVH-hosted domains using the default SPF record. Since the SPF policy\nexplicitly authorizes OVH mail servers (mx.ovh.com) to send mail on behalf of\nthese domains, forged messages successfully pass SPF validation despite\nnot being authorized by the impersonated domain owner.","state":0,"publishedAt":"2026-10-07T15:00:14.278+00:00","modifiedAt":"2026-10-07T20:27:49.038+00:00","affected":[{"ecosystem":"Vendor product","name":"OVHcloud","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"OVHcloud\",\n                    \"product\": \"OVHcloud\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"2026-07-20\",\n                            \"versionType\": \"date\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:A","score":6.3,"severity":"MEDIUM"}],"references":["https://docs.ovhcloud.com/en/guides/web-cloud/email-and-collaborative-solutions/troubleshooting/email-rejected-cross-domain-spoofing"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-33586","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-33586","identifiers":["CVE-2026-33586"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-11T10:57:37.6316309+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-11T10:57:37.6316309+00:00","lastSuccessAt":"2026-11-11T10:57:37.7940559+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:37.7940585+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-de3b77103708811b6494d2ff7c979037d73ae579742cd1649a5c765137ae5083-b61703aa7a8a8776341875d56ae04881d75cb51c03ebed7341566c1aac4b78f3","complete":true,"records":424026,"lastAttemptAt":"2026-11-11T10:57:30.8429465+00:00","lastSuccessAt":"2026-11-11T10:57:30.772003+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:30.8429465+00:00","snapshotPublishedAt":"2026-11-11T10:28:18+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-a49c5a32df8948c98224147a9db89c0c","complete":false,"records":13758,"lastAttemptAt":"2026-11-11T11:02:07.5457804+00:00","lastSuccessAt":"2026-11-11T11:02:07.6143961+00:00","error":null,"lastVerifiedAt":"2026-11-11T11:02:07.6143961+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-11T10:57:37.6316309+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T10:57:37.6316309+00:00","lastSuccessAt":"2026-11-11T10:57:37.7955954+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:37.7955973+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-622dd4c770014d0cabbdd0941fabd46f","complete":true,"records":13752,"lastAttemptAt":"2026-11-11T10:57:38.8624284+00:00","lastSuccessAt":"2026-11-11T10:57:38.856+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:38.856+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13812,"expectedIdentifiers":13812,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-11T10:57:31.188043+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:31.188043+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-11T10:57:30.9764176+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:30.9764176+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-b178858a6ba5f2e20262964fa29d9573839d1b8b735abe524cc7d061ebde5c37","complete":true,"records":3088,"lastAttemptAt":"2026-11-11T10:57:37.5961627+00:00","lastSuccessAt":"2026-11-11T10:57:37.4490966+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:37.5961627+00:00","snapshotPublishedAt":"2026-11-11T10:48:28+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-085e065fc9050ae18408f7e722c39653aeb186872334d7b3ec1fcafb7ed43d25","complete":true,"records":231665,"lastAttemptAt":"2026-11-11T10:57:31.0815536+00:00","lastSuccessAt":"2026-11-11T08:27:45.2700102+00:00","error":null,"lastVerifiedAt":"2026-11-11T10:57:31.0815536+00:00","snapshotPublishedAt":"2026-11-11T07:32:59+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}