{"id":"CVE-2026-34969","state":"PUBLISHED","title":"Nhost Leaks the Refresh Token via URL Query Parameter in OAuth Provider Callback","description":"Nhost is an open source Firebase alternative with GraphQL. Prior to 0.48.0, the auth service's OAuth provider callback flow places the refresh token directly into the redirect URL as a query parameter. Refresh tokens in URLs are logged in browser history, server access logs, HTTP Referer headers, and proxy/CDN logs. Note that the refresh token is one-time use and all of these leak vectors are on owned infrastructure or services integrated by the application developer. This vulnerability is fixed in 0.48.0.","publishedAt":"2026-04-06T16:01:10.174Z","updatedAt":"2026-04-07T16:00:25.296Z","severity":{"score":2.3,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["nhost nhost"],"affected":[{"vendor":"nhost","product":"nhost","versions":[{"version":"< 0.48.0","status":"affected"}]}],"references":["https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r"],"weaknesses":["CWE-200","CWE-598"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34969.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34969","state":"PUBLISHED","datePublished":"2026-04-06T16:01:10.174Z","dateUpdated":"2026-04-07T16:00:25.296Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-31T19:38:31.616Z"},"containers":{"cna":{"title":"Nhost Leaks the Refresh Token via URL Query Parameter in OAuth Provider Callback","descriptions":[{"lang":"en","value":"Nhost is an open source Firebase alternative with GraphQL. Prior to 0.48.0, the auth service's OAuth provider callback flow places the refresh token directly into the redirect URL as a query parameter. Refresh tokens in URLs are logged in browser history, server access logs, HTTP Referer headers, and proxy/CDN logs. Note that the refresh token is one-time use and all of these leak vectors are on owned infrastructure or services integrated by the application developer. This vulnerability is fixed in 0.48.0."}],"affected":[{"vendor":"nhost","product":"nhost","versions":[{"version":"< 0.48.0","status":"affected"}]}],"references":[{"url":"https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r","name":"https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.3,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-200","lang":"en","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-598","lang":"en","description":"CWE-598: Use of GET Request Method With Sensitive Query Strings","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-06T16:01:10.174Z"},"source":{"advisory":"GHSA-g2qj-prgh-4g9r","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-07T15:47:19.923890Z","id":"CVE-2026-34969","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-07T16:00:25.296Z"}}]}}}