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PatchSiren cyber security CVE debrief

CVE-2026-71962 FlowiseAI CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-10T19:17:31.400Z and has not been modified since then. The NVD entry is currently Awaiting Analysis. Flowise versions 2.2.4 through 3.1.4 contain a missing authorization vulnerability in the POST /api/v1/openai-assistants-file/download endpoint. This allows unauthenticated attackers to access private files by exploiting the endpoint's inclusion in the global authentication whitelist, which bypasses all session and API key verification. Attackers can supply valid chatflowId, chatId, and fileName identifiers to retrieve files from any chatflow on the instance, including private chatflows belonging to other workspaces or organizations. Organizations using Flowise should prioritize verifying their instances' exposure and applying vendor remediation to prevent unauthorized file access. The vulnerability's scope and impact require further verification due to limited source detail. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review compensating controls for exposed systems while remediation is scheduled and verified. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Vendor
FlowiseAI
Product
Flowise
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-10
Original CVE updated
2026-08-31
Advisory published
2026-08-10
Advisory updated
2026-08-31

Who should care

Organizations using Flowise, especially those with sensitive data or private chatflows, should prioritize verifying their instances' exposure and applying vendor remediation to prevent unauthorized file access.

Technical summary

The Flowise versions 2.2.4 through 3.1.4 contain a missing authorization vulnerability in the POST /api/v1/openai-assistants-file/download endpoint. This allows unauthenticated attackers to access private files by exploiting the endpoint's inclusion in the global authentication whitelist, which bypasses all session and API key verification. Attackers can supply valid chatflowId, chatId, and fileName identifiers to retrieve files from any chatflow on the instance, including private chatflows belonging to other workspaces or organizations.

Defensive priority

Organizations using Flowise should prioritize verifying their instances' exposure and applying vendor remediation to prevent unauthorized file access.

Recommended defensive actions

  • Verify Flowise instance exposure and apply vendor remediation
  • Implement compensating controls to restrict access to the vulnerable endpoint
  • Monitor for suspicious activity related to the /api/v1/openai-assistants-file/download endpoint
  • Inventory and track Flowise instances within the organization
  • Exception tracking for unauthorized access attempts

Evidence notes

The CVE description indicates that Flowise versions 2.2.4 through 3.1.4 have a missing authorization vulnerability in the POST /api/v1/openai-assistants-file/download endpoint. This allows unauthenticated attackers to access private files by exploiting the endpoint's inclusion in the global authentication whitelist, bypassing all session and API key verification. However, the source detail is limited, and further verification is needed to confirm the vulnerability's scope and impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-71962 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-71962

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-71962 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-71962

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.