# CVE-2023-30798: MultipartParser denial of service with too many fields or files

Source: https://junglewise.ai/threats/cve-2023-30798-multipartparser-denial-of-service-with-too-many-fields-or-files  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-04-21  
License: CC BY 4.0 with a link back

CVE-2023-30798 · Severity: low · CVSS 3.1 · Published 2023-04-21

There MultipartParser usage in Encode's Starlette python framework before versions 0.25.0 allows an unauthenticated and remote attacker to specify any number of form fields or files which can cause excessive memory usage resulting in denial of service of the HTTP service.

Technologies: [starlette (PyPI)](https://junglewise.ai/threats/technologies/pypi-starlette). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2023-30798 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-30798 being exploited in the wild.

**How severe is CVE-2023-30798?** Low severity, with a CVSS score of 3.1, published 21 April 2023.

**Which products and versions are affected?** starlette (PyPI) ECOSYSTEM:introduced=0,fixed=0.25.0, GIT:introduced=0,fixed=8c74c2c8dba7030154f8af18e016136bea1938fa|ECOSYSTEM:introduced=0,fixed=0.25.0.

**Is there a fix for CVE-2023-30798?** Yes. starlette (PyPI): upgrade to 0.25.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2023-30798?** Check whether you run starlette (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- starlette (PyPI): upgrade to 0.25.0 or later

  ```sh
  pip install "starlette>=0.25.0"
  ```


## Affected products

- starlette (PyPI) ECOSYSTEM:introduced=0,fixed=0.25.0, GIT:introduced=0,fixed=8c74c2c8dba7030154f8af18e016136bea1938fa|ECOSYSTEM:introduced=0,fixed=0.25.0

## Identifiers

- CVE-2023-30798
- GHSA-74m5-2c7w-9w3x
- PYSEC-2023-48

## Related threats

- [PYSEC-2026-1941 - Starlette has possible denial-of-service vector when parsing large files in multipart forms](https://junglewise.ai/threats/cve-2025-54121-starlette-denial-of-service-in-multipart-form-parsing)
- [PYSEC-2026-1943 - Starlette Denial of service (DoS) via multipart/form-data](https://junglewise.ai/threats/cve-2024-47874-starlette-denial-of-service-dos-via-multipart-form-data)
- [Starlette denial of service via resource limit bypass in request.form](https://junglewise.ai/threats/cve-2026-54283-starlette-denial-of-service-via-resource-limit-bypass-in-request)
- [Kludex Starlette hostname spoofing via unvalidated request path](https://junglewise.ai/threats/cve-2026-54282-kludex-starlette-hostname-spoofing-via-unvalidated-request-path)
- [Starlette unsafe reflection in HTTPEndpoint method dispatching](https://junglewise.ai/threats/cve-2026-48817-starlette-unsafe-reflection-in-httpendpoint-method-dispatching)