{"id":"BIT-python-min-2026-6879","summary":"Quadratic Behavior in xml.etree.ElementPath Index Predicates","details":"`Element.findall()` and fully-consumed `Element.iterfind()` exhibit `O(n^2)` time complexity when using XPath index predicates (e.g. `[1]`, `[last()]`, `[last()-N]`) on XML documents with many same-tag siblings. `Element.find()` is only affected when the first match is near the end  of the sibling list, such as with `[last()]` or `[last()-N]`;  `.//item[1]` short-circuits after the first match.","aliases":["BIT-libpython-2026-6879","BIT-python-2026-6879","CVE-2026-6879","PSF-2026-34"],"modified":"2026-08-17T08:10:57.238102254Z","published":"2026-08-17T05:55:13.195Z","database_specific":{"severity":"Low","cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://github.com/python/cpython/commit/02c08e6b747ac43d0d866a4ffa916bedf3423f81"},{"type":"WEB","url":"https://github.com/python/cpython/commit/037965c00a427cba5c05447efadc67c51a492e85"},{"type":"WEB","url":"https://github.com/python/cpython/commit/0583f24ae678993e3f7939f51ad5bcae5ad9dc70"},{"type":"WEB","url":"https://github.com/python/cpython/commit/2ffab083782968a4d732738f4f1dff6bbd69d2b0"},{"type":"WEB","url":"https://github.com/python/cpython/commit/390337b8ba1658833fdef379e1739c9f9533a8db"},{"type":"WEB","url":"https://github.com/python/cpython/commit/96510a3758f4a075f43223afdee3b6ee1a7a7f02"},{"type":"WEB","url":"https://github.com/python/cpython/commit/cb409342a19f25656f62e679f8bac265fe1442c3"},{"type":"WEB","url":"https://github.com/python/cpython/issues/152674"},{"type":"WEB","url":"https://github.com/python/cpython/pull/152676"},{"type":"WEB","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/7YMZ6DDZVR26TJJBVO3RDNBAVGHNYAKR/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6879"}],"affected":[{"package":{"name":"python-min","ecosystem":"Bitnami","purl":"pkg:bitnami/python-min"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.13.15"},{"introduced":"3.14.0"},{"fixed":"3.14.7"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/python-min/BIT-python-min-2026-6879.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/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":"1.9.0"}