Threat Intel

v0.1

← CVEs

CVE-2026-30821

CRIT 9.8
Published
2026-03-07
Last Modified
2026-03-11
Affected Apps
8
Affected Devices
152
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 (magic bytes) or extension (file.originalname). Consequently, an attacker can bypass this restriction by spoofing the Content-Type as a permitted type (e.g., application/pdf) while uploading malicious scripts or arbitrary files. Once uploaded via addArrayFilesToStorage, these files persist in backend storage (S3, GCS, or local disk). This vulnerability serves as a critical entry point that, when chained with other features like static hosting or file retrieval, can lead to Stored XSS, malicious file hosting, or Remote Code Execution (RCE). This issue has been patched in version 3.0.13.
Affected Applications in Environment 8
Flow v2.0.143.0
130 devices
Flow v2.0.137.0
2 devices
Flow v1.3.173.0
7 devices
Flow v1.3.176.0
9 devices
Flow v1.3.51.1
1 device
Flow v1.3.51.0
2 devices
Flow v1.3.174.0
1 device
Flow v2.0.148.0
1 device
Affected Devices 152
118B-13 Windows 118B-14 Windows 118B-15 Windows 118B-18 Windows DESKTOP-2F2IHK3 Windows DESKTOP-PIEDSC2 Windows DPADVS-L72018DT Windows DPADVS-L72115D7 Windows DPAGNF-A7412369 Windows DPAGNF-A741236B Windows DPAGNF-A805193T Windows DPATHL-835405G Windows DPATHL-83540MD Windows DPBIOL-MITZI Windows DPCDIS-R90ZC0S3 Windows DPCHEM-5VDSTNE Windows DPELED-D81938YB Windows DPEMAE-92503DF Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-02 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-03 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-04 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-05 Windows DPITED-L240-06 Windows DPITED-L240-06 Windows DPITED-L240-06 Windows DPITED-L240-06 Windows DPITED-L240-06 Windows DPITED-L240-07 Windows DPITED-L240-07 Windows DPITED-L240-07 Windows DPITED-L240-08 Windows DPITED-L240-08 Windows DPITED-L240-08 Windows DPITED-L240-08 Windows DPITED-L240-08 Windows DPITED-L240-08 Windows DPITED-L240-08 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-09 Windows DPITED-L240-10 Windows DPITED-L240-10 Windows DPITED-L240-10 Windows DPITED-L240-10 Windows DPITED-L240-10 Windows DPITED-L240-10 Windows DPITED-L240-10 Windows DPITED-L240-10 Windows DPITED-L240-11 Windows DPITED-L240-11 Windows DPITED-L240-11 Windows DPITED-L240-11 Windows DPITED-L240-11 Windows DPITED-L240-11 Windows DPITED-L240-11 Windows DPITED-L240-12 Windows DPITED-L240-12 Windows DPITED-L240-12 Windows DPITED-L240-12 Windows DPITED-L240-12 Windows DPITED-L240-12 Windows DPITED-L240-12 Windows DPITED-L240-12 Windows DPITED-L240-13 Windows DPITED-L240-13 Windows DPITED-L240-13 Windows DPITED-L240-13 Windows DPITED-L240-13 Windows DPITED-L240-13 Windows DPITED-L240-13 Windows DPITED-L240-14 Windows DPITED-L240-14 Windows DPITED-L240-14 Windows DPITED-L240-14 Windows DPITED-L240-14 Windows DPITED-L240-14 Windows DPITED-L240-14 Windows DPITED-L240-16 Windows DPITED-L240-16 Windows DPITED-L240-16 Windows DPITED-L240-16 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows DPITED-L240-17 Windows FACHVAC-HP640-2 Windows FACHVAC-HP640-4 Windows FACHVAC-HP640-5 Windows FACHVAC92505LP Windows HDFS-MXL9273YJB Windows HRU5 Windows HRU6 Windows HSWENSON Windows KRANDOLPH Windows
References 2