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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. HTTPX2 is a next generation HTTP client for Python. Prior to 2.11.0, FileField.render_headers() in src/httpx2/httpx2/_multipart.py directly interpolates attacker-controlled content_type values and custom headers from the files= three-element (filename, content, content_type) tuple and the files= four-element (filename, content, content_type, headers) tuple into multipart/form-data part headers without validating header names or values. CR or LF characters can terminate a part header, inject additional part headers, or end the part header block early, allowing a downstream multipart parser to treat attacker-supplied lines as genuine headers and potentially alter part semantics or bypass header-based checks. This issue is fixed in version 2.11.0.
Fedora 45+ already have a recent enough version of python-httpx2. Fedora 44 has an older version for dependency reasons, particularly click, but it appears that upstream’s lower bound is overly conservative and can be loosened, allowing the package to be updated.
FEDORA-2026-a69588e2cd (python-httpx2-2.13.0-2.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-a69588e2cd
FEDORA-2026-a69588e2cd has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-a69588e2cd` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a69588e2cd See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-a69588e2cd (python-httpx2-2.13.1-1.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report.