Vulnerability · Published May 8, 2026 · Assigned by mitre
CVE-2026-38361
High 7.5
In plain English
A high-severity uncontrolled resource consumption in the dash-uploader package (PyPI). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 86% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
Multiple unauthenticated denial-of-service (DoS) issues in fohrloop dash-uploader v0.1.0 through v0.7.0a2. The chunked-upload handler (dash_uploader/httprequesthandler.py, dash_uploader/upload.py) trusts unsanitized, attacker-controlled upload parameters (e.g. flowTotalChunks) and does not enforce the documented max_file_size limit, allowing a remote, unauthenticated attacker to cause an out-of-memory (OOM) process crash (unbounded range(1, flowTotalChunks + 1) allocation), truncation of the target file to zero bytes (flowTotalChunks=0, where the all([]) == True quirk runs the file-assembly branch on zero chunks), permanent disk exhaustion (never-cleaned-up temporary directories per flowIdentifier), and a complete bypass of the documented max_file_size limit.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | dash-uploader | 0.7.0a1 | PYSEC-2026-37 |
Affected products (as reported)
Weakness: CWE-400, CWE-670 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/fohrloop/dash-uploader
- https://pypi.org/project/dash-uploader/
- https://github.com/fohrloop/dash-uploader/blob/stable/dash_uploader/httprequesthandler.py
- https://github.com/fohrloop/dash-uploader/issues/153
- https://pypistats.org/packages/dash-uploader
- https://libraries.io/pypi/dash-uploader
- https://pepy.tech/project/dash-uploader
- https://docs.python.org/3/library/functions.html#all
- https://github.com/a1ohadance/CVE-2026-38361
- https://github.com/github/advisory-database/pull/7636
- https://github.com/advisories/GHSA-xp7f-v245-w3w8