Source: python-multipart Version: 0.0.26-1 Severity: important Tags: security upstream Forwarded: https://github.com/Kludex/python-multipart/pull/267 X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for python-multipart. CVE-2026-42561[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-42561 https://www.cve.org/CVERecord?id=CVE-2026-42561 [1] https://github.com/Kludex/python-multipart/security/advisories/GHSA-pp6c-gr5w-3c5g [2] https://github.com/Kludex/python-multipart/pull/267 [3] https://github.com/Kludex/python-multipart/commit/3e64f5f8caba0e5d391b0c1ad0f1c2edf9e8f911 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
