https://seclists.org/oss-sec/2026/q1/320: [oss-security][CVE-2026-3644] CPython Incomplete control character validation in http.cookies

Published Mar 16, 2026
·
Updated

Affected Software

1 affected component
pypi/cpython

Frequently Asked Questions

1

What is the severity of CVE-2026-3644?

CVE-2026-3644 is classified as a moderate severity vulnerability.

2

How do I fix CVE-2026-3644?

To fix CVE-2026-3644, update to the latest version of CPython that addresses the incomplete control character validation.

3

What are the potential impacts of CVE-2026-3644?

The potential impacts of CVE-2026-3644 include improper handling of control characters in HTTP cookie parsing, which could lead to unexpected behavior.

4

Which versions of CPython are affected by CVE-2026-3644?

CVE-2026-3644 affects specific versions of CPython prior to the security patch release.

5

Is CVE-2026-3644 being actively exploited?

As of the publication date, there are no confirmed active exploits targeting CVE-2026-3644.

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