{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41896","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-22T15:11:54.671Z","datePublished":"2026-06-29T20:16:50.951Z","dateUpdated":"2026-06-30T12:55:50.036Z"},"containers":{"cna":{"title":"Coolify: Unauthenticated Deployment Trigger via Webhook HMAC Bypass with Null Secret","problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/coollabsio/coolify/security/advisories/GHSA-w8wm-r924-f65v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/coollabsio/coolify/security/advisories/GHSA-w8wm-r924-f65v"}],"affected":[{"vendor":"coollabsio","product":"coolify","versions":[{"version":"< 4.0.0-beta.474","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-29T20:16:50.951Z"},"descriptions":[{"lang":"en","value":"Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.474, the HMAC key is the application's manual_webhook_secret_github field, which is used by Coolify's webhook endpoints to validate incoming requests, is nullable with no default — meaning newly created applications have a null webhook secret. PHP's hash_hmac() function silently coerces a null key to an empty string ''. So when the secret is null, the server computes hash_hmac('sha256', $payload, '') — a deterministic value that any attacker can calculate independently. By sending X-Hub-Signature-256: sha256=<hash_hmac('sha256', payload, '')>, an unauthenticated attacker can forge a valid signature and trigger deployments. This vulnerability is fixed in 4.0.0-beta.474."}],"source":{"advisory":"GHSA-w8wm-r924-f65v","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/coollabsio/coolify/security/advisories/GHSA-w8wm-r924-f65v","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-30T12:55:46.494918Z","id":"CVE-2026-41896","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-30T12:55:50.036Z"}}]}}