Low severityNVD Advisory· Published Jul 28, 2026· Updated Aug 13, 2026
CVE-2026-6879
CVE-2026-6879
Description
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.
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Affected products
15- osv-coords14 versionspkg:apk/wolfi/python-3.13pkg:apk/chainguard/python-3.14pkg:rpm/opensuse/python315&distro=openSUSE%20Tumbleweedpkg:apk/chainguard/python-3.12pkg:apk/wolfi/python-3.10pkg:apk/chainguard/python-3.11pkg:apk/chainguard/python-3.10pkg:bitnami/libpythonpkg:apk/chainguard/python-3.13pkg:apk/wolfi/python-3.12pkg:apk/wolfi/python-3.11pkg:bitnami/pythonpkg:bitnami/python-minpkg:apk/wolfi/python-3.14
< 3.13.15-r0+ 13 more
- (no CPE)range: < 3.13.15-r0
- (no CPE)range: < 3.14.7-r0
- (no CPE)range: < 3.15.0~rc2-1.1
- (no CPE)range: < 3.12.14-r0
- (no CPE)range: < 3.10.21-r0
- (no CPE)range: < 3.11.16-r0
- (no CPE)range: < 3.10.21-r0
- (no CPE)range: < 3.10.21
- (no CPE)range: < 3.13.15-r0
- (no CPE)range: < 3.12.14-r0
- (no CPE)range: < 3.11.16-r0
- (no CPE)range: < 3.10.21
- (no CPE)range: < 3.10.21
- (no CPE)range: < 3.14.7-r0
Patches
Vulnerability mechanics
References
10- github.com/python/cpython/commit/02c08e6b747ac43d0d866a4ffa916bedf3423f81nvd
- github.com/python/cpython/commit/037965c00a427cba5c05447efadc67c51a492e85nvd
- github.com/python/cpython/commit/0583f24ae678993e3f7939f51ad5bcae5ad9dc70nvd
- github.com/python/cpython/commit/2ffab083782968a4d732738f4f1dff6bbd69d2b0nvd
- github.com/python/cpython/commit/390337b8ba1658833fdef379e1739c9f9533a8dbnvd
- github.com/python/cpython/commit/96510a3758f4a075f43223afdee3b6ee1a7a7f02nvd
- github.com/python/cpython/commit/cb409342a19f25656f62e679f8bac265fe1442c3nvd
- github.com/python/cpython/issues/152674nvd
- github.com/python/cpython/pull/152676nvd
- mail.python.org/archives/list/[email protected]/thread/7YMZ6DDZVR26TJJBVO3RDNBAVGHNYAKR/nvd
News mentions
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