CVE-2026-3644

CVE-2026-3644 is confirmed: In CPython, incomplete control character validation in http.cookies/Morsel (and related paths in Morsel.update, |=, unpickling, and BaseCookie.js_output) allows bypassing input validation and can enable HTTP header injection when cookie values or parameters contain con...

CVE-2026-3644 Incomplete control character validation in http.cookies

The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update, |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.jsoutput lacked the output validation applie...

Linux Distros Unpatched Vulnerability : CVE-2026-3644

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update, |= operator, and unpickling paths were n...