Potential DoS via quadratic complexity in unicodedata.normalize()
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.
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beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2026-3276US | — | — | ||
unicodedata.normalize() can take excessive CPU time when processing
specially crafted Unicode input containing long runs of combining characters
with alternating Canonical Combinin… | ||||
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Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- http://www.openwall.com/lists/oss-security/2026/06/03/15WEB
- https://github.com/python/cpython/commit/6b505d1f41f8f3ea0fe5a4786d3a8fff1875cfc0WEB
- https://github.com/python/cpython/commit/90748760d38ca3ac5fc6788a69becab905c95598WEB
- https://github.com/python/cpython/commit/991224b1e8311c85f198f6dd8208bf8cff7fc26fWEB
- https://github.com/python/cpython/commit/ba785b88add96acbf403d65cb157fb2743a33a32WEB
- https://github.com/python/cpython/commit/c5512bd7c1dc28055660565275012766941d3066WEB
- https://github.com/python/cpython/commit/d3ab945af25b28dfe13ac6cb40c124a01b33ce1fWEB
- https://github.com/python/cpython/commit/db744c0776c1d5dd11aaa70eff2a6993c408baccWEB
scry
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