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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade python3 | Aug 17, 2026 | Jun 3, 2026 |
| Amazon_linux_2023 | — | Upgrade python3.11-testUpgrade python3.14-freethreading-libsUpgrade python3.14-debugsourceUpgrade python3.14Upgrade python3.11-develUpgrade python3.14-libsUpgrade python3-tkinterUpgrade python-unversioned-commandUpgrade python3.11-tkinterUpgrade python3Upgrade python3-develUpgrade python3.11Upgrade python3.14-freethreadingUpgrade python3.9-debuginfoUpgrade python3-idleUpgrade python3.11-debugsourceUpgrade python3.14-idleUpgrade python3.14-freethreading-testUpgrade python3.14-testUpgrade python3.11-debugUpgrade python3.14-debuginfoUpgrade python3.9-debugsourceUpgrade python3.14-freethreading-develUpgrade python3.11-idleUpgrade python3-testUpgrade python3.14-develUpgrade python3.14-freethreading-debugUpgrade python3.14-freethreading-idleUpgrade python3.11-debuginfoUpgrade python3-libsUpgrade python3.14-tkinterUpgrade python3.11-libsUpgrade python3-debugUpgrade python3.14-debugUpgrade python3.14-freethreading-tkinter | Jul 8, 2026 | Jun 3, 2026 |
| Debian | — | Upgrade python3.13Upgrade python3.11 | Jul 23, 2026 | Jun 3, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jun 3, 2026 |
| Ubuntu | — | Upgrade python3.12Upgrade libpython3.14Upgrade libpython3.10Upgrade python3.14Upgrade libpython3.12t64Upgrade python3.10 | Jul 6, 2026 | Jun 3, 2026 |
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