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vulnerabilityCVE-2026-3276
Name
CVE-2026-3276
Source
NVD ( link)Debian ( link)
Description
unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms.
Published Date
Updated Date
Workaround
-
Advisories

Analysis#


Affected Component
Analysis
python3
Patched

Vulnerability Ratings#


6.3
CVSSv4
NaN
other

Others affected components#


Name
Project
Project Version
Version
Status
buildroot
master
3.14.6
Not Affected
openwrt
master
3.14.5-r1
Not Affected
openwrt
openwrt-25.12
3.13.9-r3
Not Affected
yocto
kirkstone
3.10.20
Not Affected
yocto
master
3.14.6
Not Affected
yocto
scarthgap
3.12.13
Not Affected

Resolved with patches#


python3 (buildroot:2025.02.x)

#
Title
Author
Resolve
1
[3.12] gh-149079: Fix O(n^2) canonical ordering in
Petr Viktorin <encukou@gmail.com>
CVE-2026-3276