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Message-ID: <92073589-e413-4692-850a-c5b76fac5ae7@oracle.com>
Date: Thu, 29 Oct 2026 10:56:51 -0700
From: Alan Coopersmith <alan.coopersmith@...cle.com>
To: oss-security@...ts.openwall.com
Subject: CPython [CVE-2026-116566] socket.getaddrinfo() accepts
embedded null bytes in host and port
-------- Forwarded Message --------
Subject: [Security-announce][CVE-2026-116566] socket.getaddrinfo() accepts
embedded null bytes in host and port
Date: Thu, 29 Oct 2026 17:46:30 +0000
From: Seth Larson <seth@...hon.org>
Reply-To: security-sig@...hon.org
To: security-announce@...hon.org
There is a MEDIUM severity vulnerability affecting CPython.
socket.getaddrinfo() previously accepted null bytes within *host* and *port*
parameters which can cause the values to be silently truncated.
Please see the linked CVE ID for the latest information on affected versions:
* https://www.cve.org/CVERecord?id=CVE-2026-116566
* https://github.com/python/cpython/pull/160899
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