cve 2026 3644

The tag CVE-2026-3644 covers a security vulnerability involving incomplete control character validation in Python's http.cookies module, which can allow attacker-controlled cookie data to bleed into HTTP headers. This issue was addressed by the Python Software Foundation with a fix that rejects all control characters within cookie names, values, and parameters. While the Microsoft Security Response Center page for CVE-2026-3644 may be unavailable, the vulnerability is understood through Python security advisories. Discussions on WindowsForum.com focus on the technical details of the bug, its potential for header injection, and the importance of applying the patch to mitigate risks in Python-based applications.