{"id":"DEBIAN-CVE-2026-3276","details":"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.","modified":"2026-09-01T16:06:39.210537810Z","published":"2026-06-03T16:16:29.253Z","upstream":["CVE-2026-3276"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-3276"}],"affected":[{"package":{"name":"python3.11","ecosystem":"Debian:12","purl":"pkg:deb/debian/python3.11?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11.2-6","3.11.2-6+deb12u1","3.11.2-6+deb12u2","3.11.2-6+deb12u3","3.11.2-6+deb12u4","3.11.2-6+deb12u5","3.11.2-6+deb12u6","3.11.2-6+deb12u7","3.11.2-6+deb12u8","3.11.3-1","3.11.3-2","3.11.4-1","3.11.5-1","3.11.5-2","3.11.5-3","3.11.6-1","3.11.6-2","3.11.6-3","3.11.6-3~hurd.2","3.11.7-1","3.11.7-2","3.11.8-1","3.11.8-1.1~exp1","3.11.8-1.1~exp2","3.11.8-2","3.11.8-3","3.11.8-3+hurd.1","3.11.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3276.json"}},{"package":{"name":"python3.13","ecosystem":"Debian:13","purl":"pkg:deb/debian/python3.13?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.5-2+deb13u3"}]}],"versions":["3.13.5-2","3.13.5-2+deb13u1","3.13.5-2+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3276.json"}},{"package":{"name":"python3.13","ecosystem":"Debian:14","purl":"pkg:deb/debian/python3.13?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.14-1"}]}],"versions":["3.13.11-1","3.13.12-1","3.13.5-2","3.13.6-1","3.13.7-1","3.13.8-1","3.13.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3276.json"}},{"package":{"name":"python3.14","ecosystem":"Debian:14","purl":"pkg:deb/debian/python3.14?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.6-1"}]}],"versions":["3.14.0-1","3.14.0-2","3.14.0-3","3.14.0-4","3.14.0-5","3.14.0~a7-1","3.14.0~b1-1","3.14.0~b2-1","3.14.0~b3-1","3.14.0~b4-1","3.14.0~rc1-1","3.14.0~rc2-1","3.14.0~rc3-1","3.14.2-1","3.14.3-1","3.14.3-2","3.14.3-3","3.14.3-4","3.14.3-5","3.14.4-1","3.14.4-2","3.14.5-1","3.14.5~rc1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3276.json"}}],"schema_version":"1.9.0","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"}]}