| Component | Flowise |
| Severity | medium (CVSS 6.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| Published (NVD) | 2026-06-22 |
| Affected versions | <= 3.1.2 <= 3.1.2 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | see the vendor advisory |
| Weakness | CWE-22 |
| CISA KEV | not listed |
NVD 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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep Flowise off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-12821
- 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
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Flowise through 3.1.4 (Enterprise/platform mode with SSO enabled) contains an authentication bypass in the SSO login path. When an SSO callb...