Description

The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().

INFO

Published Date :

2026-03-16T17:37:31.344Z

Last Modified :

2026-03-16T18:25:55.021Z

Source :

PSF
AFFECTED PRODUCTS

The following products are affected by CVE-2026-3644 vulnerability.

Vendors Products
Python
  • Cpython
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-3644.

URL Resource
https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4 cve-icon cve-icon cve-icon
https://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590dd cve-icon cve-icon
https://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979dd cve-icon cve-icon
https://github.com/python/cpython/issues/145599 cve-icon cve-icon cve-icon
https://github.com/python/cpython/pull/145600 cve-icon cve-icon cve-icon
https://mail.python.org/archives/list/[email protected]/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/ cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-3644 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-3644 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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SS Confidentiality
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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact