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CVE-2026-30821

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.0.13, the /api/v1/attachments/:chatflowId/:chatId endpoint is listed in WHITELIST_URLS, allowing unauthenticated access to the file upload API. While the server validates uploads based on the MIME types defined in chatbotConfig.fullFileUpload.allowedUploadFileTypes, it implicitly trusts the client-provided Content-Type header (file.mimetype) without verifying the file's actual content (mag
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d2a85ba7699c6182e8ce7cfbfe32e10bb53177363f3a68cb4cb40e9c996754d9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"Flowise","vendor":"FlowiseAI","versions":[{"status":"affected","version":"< 3.0.13"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:acc69a06a25539354768424f2eeef7d7f674af9f9651b3a94bff9f6c0d0ea194 · sha256:33901851e0682d7a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:acc69a06a25539354768424f2eeef7d7f674af9f9651b3a94bff9f6c0d0ea194 · sha256:33901851e0682d7a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-434","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:acc69a06a25539354768424f2eeef7d7f674af9f9651b3a94bff9f6c0d0ea194 · sha256:33901851e0682d7a… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.0.13","tags":["x_refsource_MISC"],"url":"https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.0.13"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:acc69a06a25539354768424f2eeef7d7f674af9f9651b3a94bff9f6c0d0ea194 · sha256:33901851e0682d7a… · /containers/cna/references/1
{"name":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-j8g8-j7fc-43v6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-j8g8-j7fc-43v6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:acc69a06a25539354768424f2eeef7d7f674af9f9651b3a94bff9f6c0d0ea194 · sha256:33901851e0682d7a… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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