{"id":"CVE-2026-75511","revision":null,"records":[{"revision":"e71d351664fc4ca08e4cb64b096f2f4e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-75511","aliases":[],"title":"Novu: Server-Side Request Forgery (SSRF) via Chat Provider Webhook URLs","description":"Novu provides an API for sending notifications through multiple channels. Prior to 3.18.0, Novu accepts chat webhook URLs from subscriber credentials.webhookUrl, channel endpoint endpoint.url, event payload.webhookUrl, and event overrides.webhookUrl, then passes the selected endpoint.url through send-message-chat.usecase.ts to raw HTTP requests in the Slack, Discord, Mattermost, Microsoft Teams, Grafana On-Call, Ryver, Rocket.Chat, GetStream, and Zulip providers. An authenticated user can supply an internal or otherwise restricted destination because these paths do not apply normalizeOutboundHttpUrl, assertSafeOutboundUrl, or the DNS-pinned safeOutboundJsonRequest protection used by the generic webhook providers. The Novu worker can consequently issue attacker-directed POST requests to internal network services and cause interactions or actions supported by those services. This issue is fixed in version 3.18.0.","state":0,"publishedAt":"2026-09-22T15:49:37.481+00:00","modifiedAt":"2026-09-25T23:42:12.19+00:00","affected":[{"ecosystem":"Vendor product","name":"novu","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"novuhq\",\n                    \"product\": \"novu\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.18.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"api-service","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@novu\",\n                    \"product\": \"api-service\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.18.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/novuhq/novu/security/advisories/GHSA-pg9q-8v57-hqph","https://github.com/novuhq/novu/pull/11455","https://github.com/novuhq/novu/commit/dabfd66457c0b98ad46a8186e69f74f570a990c2","https://github.com/novuhq/novu/releases/tag/v3.18.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-75511","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-75511","identifiers":["CVE-2026-75511"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-12T09:55:31.2947259+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T09:55:31.2947259+00:00","lastSuccessAt":"2026-11-12T09:55:31.4798179+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:55:31.4798182+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. 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