CVE-2026-3644

Published: Mar 16, 2026 Last Modified: Mar 16, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,0
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation 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 not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().

20

Improper Input Validation

Stable
Common Consequences
Security Scopes Affected:
Availability Confidentiality Integrity
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Read Memory Read Files Or Directories Modify Memory Execute Unauthorized Code Or Commands
Applicable Platforms
All platforms may be affected
View CWE Details
116

Improper Encoding or Escaping of Output

Draft
Common Consequences
Security Scopes Affected:
Integrity Confidentiality Availability Access Control
Potential Impacts:
Modify Application Data Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Technologies: AI/ML, Database Server, Not Technology-Specific, Web Server
View CWE Details
https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6…
https://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590…
https://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979…
https://github.com/python/cpython/issues/145599
https://github.com/python/cpython/pull/145600
https://mail.python.org/archives/list/[email protected]/thread/H6CAD…