Input validation error in Python - CVE-2025-1795
Published: April 25, 2025
Vulnerability identifier: #VU107949
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-1795
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Python.org
Affected software:
Python
Python
Detailed vulnerability description
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to insufficient validation of user-supplied input in Lib/email/_header_value_parser.py. A remote attacker can pass specially crafted input to the application and manipulate headers in an email message.
How to mitigate CVE-2025-1795
Install updates from vendor's website.
Sources
- https://github.com/python/cpython/commit/09fab93c3d857496c0bd162797fab816c311ee48
- https://github.com/python/cpython/commit/70754d21c288535e86070ca7a6e90dcb670b8593
- https://github.com/python/cpython/commit/9148b77e0af91cdacaa7fe3dfac09635c3fe9a74
- https://github.com/python/cpython/issues/100884
- https://github.com/python/cpython/pull/100885
- https://github.com/python/cpython/pull/119099
- https://mail.python.org/archives/list/security-announce@python.org/thread/MB62IZMEC3UM6SGHP5LET5JX2Y7H4ZUR/