CVE-2024-24762: high-severity vulnerability in Kludex python-multipart
python-multipart vulnerable to content-type header Regular expression Denial of Service
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.5%
`python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is very difficult for the RegEx to process, consuming CPU resources and stalling indefinitely (minutes or more) while holding the main event loop. This means that process can't handle any more requests, leading to regular expression denial of service. This vulnerability has been patched in version 0.0.7.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Related CVEs — Kludex python-multipart
In the same product, most dangerous first.
CVE-2026-24486HIGHPython-Multipart has Arbitrary File Write via Non-Default ConfigurationEPSS 2.2%CVE-2026-42561HIGHPython-Multipart: Denial of Service via unbounded multipart part headersEPSS 0.7%CVE-2021-32677HIGHCross-Site Request Forgery (CSRF) in FastAPIEPSS 0.7%CVE-2025-54121MEDIUMStarlette has possible denial-of-service vector when parsing large files in multipart formsEPSS 0.7%CVE-2024-47874HIGHStarlette Denial of service (DoS) via multipart/form-dataEPSS 0.7%CVE-2024-53981HIGHpython-multipart has a Denial of service (DoS) via deformation `multipart/form-data` boundaryEPSS 0.6%
References
https://github.com/andrew-d/python-multipart/blob/d3d16dae4b061c34fe9d3c9081d9800c49fc1f7a/multipart/multipart.py#L72-L74https://github.com/encode/starlette/commit/13e5c26a27f4903924624736abd6131b2da80cc5https://github.com/encode/starlette/security/advisories/GHSA-93gm-qmq6-w238https://github.com/Kludex/python-multipart/commit/20f0ef6b4e4caf7d69a667c54dff57fe467109a4https://github.com/Kludex/python-multipart/security/advisories/GHSA-2jv5-9r88-3w3phttps://github.com/tiangolo/fastapi/commit/9d34ad0ee8a0dfbbcce06f76c2d5d851085024fchttps://github.com/tiangolo/fastapi/releases/tag/0.109.1https://github.com/tiangolo/fastapi/security/advisories/GHSA-qf9m-vfgh-m389