{"id":"BIT-python-min-2026-3276","summary":"Potential DoS via quadratic complexity in unicodedata.normalize()","details":"unicodedata.normalize() can take excessive CPU time when processing\nspecially crafted Unicode input containing long runs of combining characters\nwith alternating Canonical Combining Class values.\nThis affects all normalization forms.","aliases":["BIT-libpython-2026-3276","BIT-python-2026-3276","CVE-2026-3276","PSF-2026-25"],"modified":"2026-06-05T13:41:09.838079708Z","published":"2026-06-05T13:04:10.162Z","database_specific":{"cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/03/15"},{"type":"WEB","url":"https://github.com/python/cpython/commit/6b505d1f41f8f3ea0fe5a4786d3a8fff1875cfc0"},{"type":"WEB","url":"https://github.com/python/cpython/commit/991224b1e8311c85f198f6dd8208bf8cff7fc26f"},{"type":"WEB","url":"https://github.com/python/cpython/commit/ba785b88add96acbf403d65cb157fb2743a33a32"},{"type":"WEB","url":"https://github.com/python/cpython/commit/c5512bd7c1dc28055660565275012766941d3066"},{"type":"WEB","url":"https://github.com/python/cpython/issues/149079"},{"type":"WEB","url":"https://github.com/python/cpython/pull/149080"},{"type":"WEB","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/PP5HB4K7727OBBM76KA2ILID76K3OZGZ/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3276"}],"affected":[{"package":{"name":"python-min","ecosystem":"Bitnami","purl":"pkg:bitnami/python-min"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/python-min/BIT-python-min-2026-3276.json"},"severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.7.5"}