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›vulnerability›CVE-2026-3644
Name
CVE-2026-3644
Source
NVD ( link)Debian ( link)
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().
CWEs
CWE-20
Published Date
Updated Date
Workaround
-
Advisories
https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4Patch
https://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590ddPatch
https://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979ddPatch
https://github.com/python/cpython/issues/145599Issue Tracking
https://github.com/python/cpython/pull/145600Patch
https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/Third Party Advisory

Analysis#

Affected Component
Analysis
python3
Exploitable

Vulnerability Ratings#

6
CVSSv4
7.5
CVSSv31
NaN
other

Others affected components#

Name
Project
Project Version
Version
Status
python3
buildroot
master
3.14.7
Not Affected
python3
openwrt
master
3.14.5-r2
Not Affected
python3
openwrt
openwrt-25.12
3.13.9-r3
Exploitable
python3
yocto
kirkstone
3.10.20
Exploitable
python3
yocto
master
3.14.7
Not Affected
python3
yocto
scarthgap
3.12.13
Patched

Resolved with patches#

python3 (yocto:scarthgap)

#
Title
Author
Resolve
1
[3.13] gh-145599, CVE 2026-3644: Reject control
"Miss Islington (bot)"
CVE-2026-0672
CVE-2026-3644