{"id":"CVE-2026-70478","state":"PUBLISHED","title":"Flowise: Unauthenticated OAuth2 token refresh endpoint returns access tokens — enables token theft for any connected service","description":"Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the POST /api/v1/oauth2-credential/refresh/:credentialId endpoint is included in WHITELIST_URLS and requires no authentication. The endpoint decrypts the stored credential, sends a refresh request to the configured OAuth provider with the client secret and refresh token, and returns the refreshed access_token in the response body. An attacker with a credential ID can use the token to access the victim's connected service and can also exhaust refresh-token quota. This issue is fixed in 3.1.3.","publishedAt":"2026-08-04T19:37:22.020Z","updatedAt":"2026-08-05T19:05:33.447Z","severity":{"score":9.2,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["FlowiseAI Flowise"],"affected":[{"vendor":"FlowiseAI","product":"Flowise","versions":[{"version":"< 3.1.2","status":"affected"}]}],"references":["https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-qgvm-j2hm-6m38"],"weaknesses":["CWE-200"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/70xxx/CVE-2026-70478.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-70478","state":"PUBLISHED","datePublished":"2026-08-04T19:37:22.020Z","dateUpdated":"2026-08-05T19:05:33.447Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-04T15:24:41.339Z"},"containers":{"cna":{"title":"Flowise: Unauthenticated OAuth2 token refresh endpoint returns access tokens — enables token theft for any connected service","descriptions":[{"lang":"en","value":"Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the POST /api/v1/oauth2-credential/refresh/:credentialId endpoint is included in WHITELIST_URLS and requires no authentication. The endpoint decrypts the stored credential, sends a refresh request to the configured OAuth provider with the client secret and refresh token, and returns the refreshed access_token in the response body. An attacker with a credential ID can use the token to access the victim's connected service and can also exhaust refresh-token quota. This issue is fixed in 3.1.3."}],"affected":[{"vendor":"FlowiseAI","product":"Flowise","versions":[{"version":"< 3.1.2","status":"affected"}]}],"references":[{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-qgvm-j2hm-6m38","name":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-qgvm-j2hm-6m38","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":9.2,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/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"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-04T19:37:22.020Z"},"source":{"advisory":"GHSA-qgvm-j2hm-6m38","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-qgvm-j2hm-6m38","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T19:05:05.323390Z","id":"CVE-2026-70478","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-05T19:05:33.447Z"}}]}}}