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Security Advisories

CVE-2026-40347

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-40347

Severity

5.3

Medium

CVSS V3

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Summary

Python-Multipart affected by Denial of Service via large multipart preamble or epilogue data

Description

Python-Multipart is a streaming multipart parser for Python. Versions prior to 0.0.26 have a denial of service vulnerability when parsing crafted multipart/form-data requests with large preamble or epilogue sections. Upgrade to version 0.0.26 or later, which skips ahead to the next boundary candidate when processing leading CR/LF data and immediately discards epilogue data after the closing boundary.

References

Affected packages


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