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Description

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.

PUBLISHED Reserved 2026-06-21 | Published 2026-06-21 | Updated 2026-06-22 | Assigner VulDB




MEDIUM: 5.3CVSS: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
MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Path Traversal

Product status

3.1.0
affected

3.1.1
affected

3.1.2
affected

Timeline

2026-06-21:Advisory disclosed
2026-06-21:VulDB entry created
2026-06-21:VulDB entry last update

Credits

ST4R (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/372611 (VDB-372611 | FlowiseAI Flowise S3 Document Loader S3.ts path traversal) vdb-entry

vuldb.com/vuln/372611/cti (VDB-372611 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-12821 (CVE-2026-12821 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/837578 (Submit #837578 | FlowiseAI/Flowise - `packages/components/nodes/documentloaders/S3/S3.ts` - `S3Directory / S3File document loader temporary-file handling` 3.1.2 Path Traversal / Arbitrary Local File Write / Unsafe Cleanup) third-party-advisory

github.com/..._s3_loader_object_key_path_traversal_vulndb.md related

cve.org (CVE-2026-12821)

nvd.nist.gov (CVE-2026-12821)

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