cvedb.io
CVE-2026-42561
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2026-05-13T21:16:47.070 · Last modified 2026-06-30T03:19:39.230

Summary

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.27, python-multipart has a denial of service vulnerability in multipart part header parsing. When parsing multipart/form-data, MultipartParser previously had no limit on the number of part headers or the size of an individual part header. An attacker could send a request with either many repeated headers without terminating the header block or a single very large header value, causing excessive CPU work before request rejection or completion. This vulnerability is fixed in 0.0.27.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.