CVE-2026-3276mediumCWE-407

CVE-2026-3276: falha de média gravidade em Python Software Foundation CPython

Potential DoS via quadratic complexity in unicodedata.normalize()

Publicada em · Atualizada em

13Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 6.3epss 0.7%
probabilidade de exploração
0.7%top 48% das CVEs
exploração observada
nãonenhuma fonte reporta
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Produtos afetados
Python Software Foundation · CPython
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Referências
https://github.com/python/cpython/commit/6b505d1f41f8f3ea0fe5a4786d3a8fff1875cfc0https://github.com/python/cpython/commit/90748760d38ca3ac5fc6788a69becab905c95598https://github.com/python/cpython/commit/991224b1e8311c85f198f6dd8208bf8cff7fc26fhttps://github.com/python/cpython/commit/ba785b88add96acbf403d65cb157fb2743a33a32https://github.com/python/cpython/commit/c5512bd7c1dc28055660565275012766941d3066https://github.com/python/cpython/commit/d3ab945af25b28dfe13ac6cb40c124a01b33ce1fhttps://github.com/python/cpython/commit/db744c0776c1d5dd11aaa70eff2a6993c408bacchttps://github.com/python/cpython/commit/e322a1857084d521f79f45181b776f62e6acfc2chttps://github.com/python/cpython/issues/149079https://github.com/python/cpython/pull/149080https://mail.python.org/archives/list/security-announce@python.org/thread/PP5HB4K7727OBBM76KA2ILID76K3OZGZ/http://www.openwall.com/lists/oss-security/2026/06/03/15