Vulnerability DatabaseCVE-2026-116566
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CVE-2026-116566
Published:October 29, 2026
Updated:October 30, 2026
socket.getaddrinfo() previously accepted null bytes within host and port parameters which can cause the values to be silently truncated.
Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (5)
https://github.com/python/cpython/pull/160899
https://github.com/python/cpython/issues/160898
http://www.openwall.com/lists/oss-security/2026/10/29/4
https://github.com/python/cpython/commit/131a3a66c5f400b588f9fd2732a5ed4e89623ee3
https://mail.python.org/archives/list/security-announce@python.org/thread/HCHE62VYTPYI6WOPJQDWUBR4CINBPSM7/
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CVSS v4
Base Score:
5.3
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
HIGH
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Null Byte or NUL Character
CWE-158