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CVE CVSS 3.7

Python-Multipart: Negative Content-Length in parse_form buffers the entire body in memory_CVE-2026-53540

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.31, parse_form() did not validate the Content-Length header before using it to bound its chunked read of the request body. A negative Content-Length turned the bounded read into a read-until-EOF, so the ...

CVE-2026-53540 Kludex python-multipart < 0.0.31

Jun 22, 2026

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Recent Advisories

Severity	ID	Title	Vendor	Product	Date	Type
HIGH 7.5	CVE-2026-53539	Python-Multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of service_CVE-2026-53539 Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, when parsing application/x-www-form-urlencoded bodies, QuerystringPar...	Kludex	python-multipart < 0.0.30	Jun 22, 2026	CVE
LOW 3.7	CVE-2026-53538	Python-Multipart: Semicolon treated as querystring field separator enables parameter smuggling_CVE-2026-53538 Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, QuerystringParser treated ; as a field separator in application/x-www...	Kludex	python-multipart < 0.0.30	Jun 22, 2026	CVE
LOW 3.7	CVE-2026-53537	Python-Multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters_CVE-2026-53537 Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, parse_options_header parsed Content-Disposition (and Content-Type) he...	Kludex	python-multipart < 0.0.30	Jun 22, 2026	CVE
HIGH 8.6	CVE-2026-50556	Angular: Missing `

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Daily Security Trends (Last 14 Days)

Python-Multipart: Negative Content-Length in parse_form buffers the entire body in memory_CVE-2026-53540

Recent Advisories

Python-Multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of service_CVE-2026-53539

Python-Multipart: Semicolon treated as querystring field separator enables parameter smuggling_CVE-2026-53538

Python-Multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters_CVE-2026-53537

Security Intelligence
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