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Findings

CVE-2019-20907

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…

Published Jul 13, 2020 · updated Oct 14, 2026 · python python

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.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 13, 2020 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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.

Affected

  • cpe canonical/ubuntu linux12.04
  • cpe debian/debian linux9.0
  • cpe fedoraproject/fedora31
  • cpe netapp/active iq unified managerversion unspecified
  • cpe opensuse/leap15.1
  • cpe opensuse/leap15.2
  • cpe oracle/zfs storage appliance kit8.8
  • cpe python/pythonversion unspecified

Sources

  • CVE.orgCVE-2019-20907

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2019-20907

    30-day exploitation probability 3.0%

    first.org
  • NIST NVDCVE-2019-20907

    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.

    nvd.nist.gov

References