{"id":"CVE-2026-61684","state":"PUBLISHED","title":"FastGPT: Unauthenticated cross-tenant data access via forgeable plugin-invoke JWT (default INVOKE_TOKEN_SECRET='token')","description":"FastGPT is a knowledge-based AI application platform. In 4.15.0-beta4, FastGPT plugin invoke reverse-call endpoints under /api/invoke/* authenticate only by verifying a JWT signed with INVOKE_TOKEN_SECRET, which defaults to the constant string token and was not set in official deployment templates. An unauthenticated attacker can self-sign an HS256 JWT and reach /api/invoke/userInfo to disclose cross-tenant user PII by attacker-supplied tmbId values, or /api/invoke/fileUpload to write attacker-controlled content into chat files. This issue is fixed in version 4.15.0-beta5.","publishedAt":"2026-07-15T14:28:22.480Z","updatedAt":"2026-07-15T15:07:19.325Z","severity":{"score":8.8,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["labring FastGPT"],"affected":[{"vendor":"labring","product":"FastGPT","versions":[{"version":"= 4.15.0-beta4","status":"affected"}]}],"references":["https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8","https://github.com/labring/FastGPT/pull/7170","https://github.com/labring/FastGPT/commit/f5f1e58b25571b7107ca49d9bf96bb2b0e0a620a","https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5"],"weaknesses":["CWE-798"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/61xxx/CVE-2026-61684.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-61684","state":"PUBLISHED","datePublished":"2026-07-15T14:28:22.480Z","dateUpdated":"2026-07-15T15:07:19.325Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-10T18:36:58.849Z"},"containers":{"cna":{"title":"FastGPT: Unauthenticated cross-tenant data access via forgeable plugin-invoke JWT (default INVOKE_TOKEN_SECRET='token')","descriptions":[{"lang":"en","value":"FastGPT is a knowledge-based AI application platform. In 4.15.0-beta4, FastGPT plugin invoke reverse-call endpoints under /api/invoke/* authenticate only by verifying a JWT signed with INVOKE_TOKEN_SECRET, which defaults to the constant string token and was not set in official deployment templates. An unauthenticated attacker can self-sign an HS256 JWT and reach /api/invoke/userInfo to disclose cross-tenant user PII by attacker-supplied tmbId values, or /api/invoke/fileUpload to write attacker-controlled content into chat files. This issue is fixed in version 4.15.0-beta5."}],"affected":[{"vendor":"labring","product":"FastGPT","versions":[{"version":"= 4.15.0-beta4","status":"affected"}]}],"references":[{"url":"https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8","name":"https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/labring/FastGPT/pull/7170","name":"https://github.com/labring/FastGPT/pull/7170","tags":["x_refsource_MISC"]},{"url":"https://github.com/labring/FastGPT/commit/f5f1e58b25571b7107ca49d9bf96bb2b0e0a620a","name":"https://github.com/labring/FastGPT/commit/f5f1e58b25571b7107ca49d9bf96bb2b0e0a620a","tags":["x_refsource_MISC"]},{"url":"https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5","name":"https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-798","lang":"en","description":"CWE-798: Use of Hard-coded Credentials","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-15T14:28:22.480Z"},"source":{"advisory":"GHSA-w732-rq8c-chc8","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T15:07:14.784543Z","id":"CVE-2026-61684","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":"2026-07-15T15:07:19.325Z"}}]}}}