CVE-2026-12821

FlowiseAI Flowise S3 Document Loader S3.ts path traversal

CVSS 5.3 MEDIUMEPSS 0.3%CWE-22

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

21 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

A vulnerability was determined in FlowiseAI Flowise up to 3.1.2. The impacted element is an unknown function of the file packages/components/nodes/documentloaders/S3/S3.ts of the component S3 Document Loader. Executing a manipulation can lead to path traversal. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Affected products

FlowiseAI · Flowise

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References

https://github.com/dxz0069/softwareoverflow/blob/main/flowise_s3_loader_object_key_path_traversal_vulndb.md https://vuldb.com/cve/CVE-2026-12821 https://vuldb.com/submit/837578 https://vuldb.com/vuln/372611 https://vuldb.com/vuln/372611/cti