CVE-2026-6879
CVE CVE-2026-6879EUVD EUVD-2026-49850Published 2026-07-28T13:46:30.000ZLast changed 2026-08-13T00:27:08.000ZCVSS 2.0
What the advisory describes
`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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Python Software Foundation — CPython 3.11.0 <3.11.16; 3.13.0 <3.13.15; 0 <3.10.21; 3.14.0 <3.14.7; 3.12.0 <3.12.14; 3.15.0a1 <3.15.0rc1
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Python — CPython
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