PYSEC-2026-3848 HTTPX2: Multipart part header injection via unvalidated file Content-Type and custom headers

Summary HTTPX2 serializes the per-file Content-Type and custom headers supplied through the files= tuple API directly into the multipart/form-data body without validating custom header names or values. An attacker who can influence upload metadata passed to HTTPX2 can use CR or LF characters to...

GHSA-H4X7-GW46-3WM6 HTTPX2: Multipart part header injection via unvalidated file Content-Type and custom headers

Summary HTTPX2 serializes the per-file Content-Type and custom headers supplied through the files= tuple API directly into the multipart/form-data body without validating custom header names or values. An attacker who can influence upload metadata passed to HTTPX2 can use CR or LF characters to...