CVE-2026-6879
Quadratic Behavior in xml.etree.ElementPath Index Predicates
LOW 2.0
En bref
- Source
- NVD
- EPSS
- EPSS 0.36 % · centile 29 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- PSF
- Statut NVD
- Awaiting Analysis
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.
Faiblesses (CWE)
- CWE-407 — Complexité algorithmique inefficace
Références
- https://github.com/python/cpython/pull/152676
- https://github.com/python/cpython/issues/152674
- https://mail.python.org/archives/list/security-announce@python.org/thread/7YMZ6DDZVR26TJJBVO3RDNBAVGHNYAKR/
- https://github.com/python/cpython/commit/2ffab083782968a4d732738f4f1dff6bbd69d2b0
- https://github.com/python/cpython/commit/02c08e6b747ac43d0d866a4ffa916bedf3423f81
- https://github.com/python/cpython/commit/390337b8ba1658833fdef379e1739c9f9533a8db
- https://github.com/python/cpython/commit/cb409342a19f25656f62e679f8bac265fe1442c3
- https://github.com/python/cpython/commit/96510a3758f4a075f43223afdee3b6ee1a7a7f02
- https://github.com/python/cpython/commit/037965c00a427cba5c05447efadc67c51a492e85
- https://github.com/python/cpython/commit/0583f24ae678993e3f7939f51ad5bcae5ad9dc70
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 4.0 | LOW 2.0 | 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 | PSF |
| CVSS 4.0 | LOW 2.0 | 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 | NVD · cna@python.org (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-49850
- GCVE · GCVE-0-2026-6879
Avis du CERT-FR
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1249 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0944 — Vulnérabilité dans CPython · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Python Software Foundation · CPython | affected 0 < 3.10.21 ; affected 3.11.0 < 3.11.16 ; affected 3.12.0 < 3.12.14 ; affected 3.13.0 < 3.13.15 ; affected 3.14.0 < 3.14.7 ; affected 3.15.0a1 < 3.15.0rc1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |