Disclosure summary
In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.
Source-reported weakness categories
CWE-835
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2019-20907
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| python | python | * {"versionStartIncluding":"3.8.0","versionEndExcluding":"3.8.5"} |
| opensuse | leap | 15.1 |
| opensuse | leap | 15.2 |
| debian | debian_linux | 9.0 |
| fedoraproject | fedora | 31 |
| fedoraproject | fedora | 32 |
| canonical | ubuntu_linux | 12.04 |
| canonical | ubuntu_linux | 14.04 |
| canonical | ubuntu_linux | 16.04 |
| canonical | ubuntu_linux | 18.04 |
| canonical | ubuntu_linux | 20.04 |
| netapp | active_iq_unified_manager | * {"versionStartIncluding":"9.5"} |
| netapp | cloud_volumes_ontap_mediator | - |
| oracle | zfs_storage_appliance_kit | 8.8 |
Original records & references
- NIST NVD record
- CVE Program record
- bugs.python.org — Issue Tracking, Vendor Advisory
- github.com — Patch, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- security.gentoo.org — Third Party Advisory
- security.netapp.com — Third Party Advisory
- usn.ubuntu.com — Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
- bugs.python.org — Issue Tracking, Vendor Advisory
- github.com — Patch, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- security.gentoo.org — Third Party Advisory
- security.netapp.com — Third Party Advisory
- usn.ubuntu.com — Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
PUBLISHED 2020-07-13T09:15:10-04:00
MODIFIED 2026-10-07T14:17:08-04:00
INGESTED 2026-10-08T12:30:34-04:00