CVE-2026-42561: falha de alta gravidade em Kludex python-multipart
Python-Multipart: Denial of Service via unbounded multipart part headers
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21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.5epss 0.7%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Produtos afetados
Kludex · python-multipartCVEs relacionadas — Kludex python-multipart
No mesmo produto, das mais perigosas para as menos.
CVE-2026-24486HIGHPython-Multipart has Arbitrary File Write via Non-Default ConfigurationEPSS 2.2%CVE-2024-24762HIGHpython-multipart vulnerable to content-type header Regular expression Denial of ServiceEPSS 1.5%CVE-2024-53981HIGHpython-multipart has a Denial of service (DoS) via deformation `multipart/form-data` boundaryEPSS 0.6%CVE-2026-53539HIGHPython-Multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of serviceEPSS 0.5%CVE-2026-40347MEDIUMPython-Multipart affected by Denial of Service via large multipart preamble or epilogue dataEPSS 0.4%CVE-2026-53540LOWPython-Multipart: Negative Content-Length in parse_form buffers the entire body in memoryEPSS 0.3%
Referências
https://access.redhat.com/errata/RHSA-2026:37275https://access.redhat.com/errata/RHSA-2026:42132https://access.redhat.com/errata/RHSA-2026:42142https://access.redhat.com/errata/RHSA-2026:43038https://access.redhat.com/errata/RHSA-2026:44696https://access.redhat.com/errata/RHSA-2026:51194https://access.redhat.com/errata/RHSA-2026:51219https://access.redhat.com/errata/RHSA-2026:51357https://access.redhat.com/security/cve/CVE-2026-42561https://bugzilla.redhat.com/show_bug.cgi?id=2477309https://github.com/Kludex/python-multipart/security/advisories/GHSA-pp6c-gr5w-3c5ghttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42561.json