CVE-2026-82049
tarfile extraction filters allow file modification and content disclosure via hard link to symlink
En bref
- Sévérité
- HIGH 8.4
- EPSS
- EPSS 0.19 % · centile 8 (2026-10-27)
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- PSF
- Statut NVD
- Awaiting Analysis
Description
In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.4 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | PSF |
| CVSS 4.0 | HIGH 8.4 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/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) |
Faiblesses (CWE)
Références européennes
- ENISA EUVD · EUVD-2026-77772
- GCVE · GCVE-0-2026-82049
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-1167 — Multiples vulnérabilités dans Python · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Python Software Foundation · CPython | affected 0 < 3.10.22 ; affected 3.11.0 < 3.11.17 ; affected 3.12.0 < 3.12.15 ; affected 3.13.0 < 3.13.16 ; affected 3.14.0a1 < 3.14.0b1 |
Références
- https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca
- https://github.com/python/cpython/issues/157190
- https://github.com/python/cpython/pull/157191
- https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/
- https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3
- https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d
- https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913
- https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771
- https://github.com/python/cpython/commit/c66df4e70435d257fd488b35ea129c6f317433a8
- https://github.com/python/cpython/commit/cc1689830c6b9aaddded2fb9f2fe8116867e2c0e
- https://github.com/python/cpython/commit/cccc7ec30212dba2abef53ce4a2bed112ddb690c
- http://www.openwall.com/lists/oss-security/2026/09/14/27
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 |