VULNERABILITY INTELLIGENCE

CVE-2026-3644

CVSS score7.5 HIGH

EPSS probability0.51%

CISA KEVNot currently listed

Published2026-03-16

Last modified2026-08-13

Description

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.js_output() lacked the output validation applied to BaseCookie.output().