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.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
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a1ohadance/CVE-2026-38361 ★ 0 · May 7, 2026
Advisory: CVE-2026-38361 multiple DoS vulnerabilities (CWE-400/CWE-670) in dash-uploader (Python/PyPI)
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- dash-uploader 0.1.0 - 0.7.0a2 - Denial-of-Service via flowTotalChunks http/cves/2026/CVE-2026-38361.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | dash-uploader | >= 0.1.0, < 0.7.0a1 | 0.7.0a1 | PYSEC-2026-37 |
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