BIT-LIBPYTHON-2026-6879 Quadratic Behavior in xml.etree.ElementPath Index Predicates

Element.findall and fully-consumed Element.iterfind exhibit On^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...

python: Python: Performance degradation in XML processing due to quadratic time complexity

A flaw was found in Python's xml.etree.ElementPath component. This vulnerability can lead to a denial of service DoS when processing specially crafted XML documents. Specifically, certain XPath index predicates used with functions like Element.findall and Element.iterfind can cause the processing...

python: Python: Performance degradation in XML processing due to quadratic time complexity

A flaw was found in Python's xml.etree.ElementPath component. This vulnerability can lead to a denial of service DoS when processing specially crafted XML documents. Specifically, certain XPath index predicates used with functions like Element.findall and Element.iterfind can cause the processing...

CVE-2026-6879 Quadratic Behavior in xml.etree.ElementPath Index Predicates

Element.findall and fully-consumed Element.iterfind exhibit On^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...

CVE-2026-6879

CVE-2026-6879 affects Python's xml.etree.ElementTree path handling. Element.findall() and fully-consumed Element.iterfind() exhibit O(n^2) time when using XPath index predicates like [1], [last()], or [last()-N] on documents with many siblings of the same tag. Element.find() is affected only when...

CVE-2026-29039 changedetection.io: XPath - Arbitrary File Read via unparsed-text()

changedetection.io is a free open source web page change detection tool. Prior to version 0.54.4, the changedetection.io application allows users to specify XPath expressions as content filters via the includefilters field. These XPath expressions are processed using the elementpath library which...