Sadly no, Python 3.9 reached its end-of-life last year, and it no longer gets security fixes: https://devguide.python.org/versions/ It's now time to upgrade to a newer Python version.
If you cannot upgrade, you should be able to copy Lib/http/cookies.py from a recent Python version to your project.
Activity
gh-145599, CVE 2026-3644: Reject control characters in `http.cookies.…
pythongh-145599, CVE 2026-3644: Reject control characters in `http.co…
pythongh-145599, CVE 2026-3644: Reject control characters in `http.co…
pythongh-145599, CVE 2026-3644: Reject control characters in `http.co…
pythongh-145599, CVE 2026-3644: Reject control characters in `http.co…
pythongh-145599, CVE 2026-3644: Reject control characters in `http.co…
[3.13] gh-145599, CVE 2026-3644: Reject control characters in `http.c…
[3.14] gh-145599, CVE 2026-3644: Reject control characters in `http.c…
nikhilgv commented on Mar 19, 2026
Hello @StanFromIreland, will this be backported to 3.9?
vstinner commented on Mar 19, 2026
Sadly no, Python 3.9 reached its end-of-life last year, and it no longer gets security fixes: https://devguide.python.org/versions/ It's now time to upgrade to a newer Python version.
If you cannot upgrade, you should be able to copy Lib/http/cookies.py from a recent Python version to your project.
lang/python314: security update to 3.14.4
2 remaining items
lang/python314: security update to 3.14.4
lang/python314: security update to 3.14.4
lang/python314: Security update to 3.14.4
lang/python314: Security update to 3.14.4
pythongh-145599, CVE 2026-3644: Reject control characters in `http.co…
[3.10] gh-145599, CVE 2026-3644: Reject control characters in `http.c…
[3.11] gh-145599, CVE 2026-3644: Reject control characters in `http.c…
lang/python314: Security update to 3.14.4
lang/python314: Security update to 3.14.4
[3.12] gh-145599, CVE 2026-3644: Reject control characters in `http.c…
package/python3: security bump to v3.12.14
[CVE 2026-3644] Reject control characters in `http.cookies.Morsel.upd…
[CVE 2026-3644] Reject control characters in `http.cookies.Morsel.upd…
[CVE 2026-3644] Reject control characters in `http.cookies.Morsel.upd…
[CVE 2026-3644] Reject control characters in `http.cookies.Morsel.upd…