Vulnerability Database

300,444

Total vulnerabilities in the database

CVE-2018-1061

python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in the difflib.IS_LINE_JUNK method. An attacker could use this flaw to cause denial of service.

  • Published: Jun 19, 2018
  • Updated: Nov 9, 2025
  • CVE: CVE-2018-1061
  • Severity: Medium
  • Exploit:

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:N/I:N/A:P

CWEs:

Software From Fixed in
python / python - 2.7.15
python / python 3.0 3.4.9
python / python 3.6 3.6.4.x
python / python 3.5.0 3.5.5.x
python / python 3.7.0-alpha1 3.7.0-alpha1.x
python / python 3.7.0-alpha2 3.7.0-alpha2.x
python / python 3.7.0-alpha3 3.7.0-alpha3.x
python / python 3.7.0-alpha4 3.7.0-alpha4.x
python / python 3.7.0-beta1 3.7.0-beta1.x
python / python 3.7.0-beta2 3.7.0-beta2.x
python / python 3.7.0-beta3 3.7.0-beta3.x
python / python 3.7.0-beta4 3.7.0-beta4.x
python / python 3.7.0-beta5 3.7.0-beta5.x
python / python 3.7.0-rc1 3.7.0-rc1.x
debian / debian_linux 8.0 8.0.x
debian / debian_linux 9.0 9.0.x
redhat / enterprise_linux_desktop 7.0 7.0.x
redhat / enterprise_linux_workstation 7.0 7.0.x
redhat / enterprise_linux_server 7.0 7.0.x
redhat / ansible_tower 3.3 3.3.x
canonical / ubuntu_linux 16.04 16.04.x
canonical / ubuntu_linux 14.04 14.04.x
canonical / ubuntu_linux 12.04 12.04.x
canonical / ubuntu_linux 18.04 18.04.x
fedoraproject / fedora 28 28.x
fedoraproject / fedora 29 29.x
fedoraproject / fedora 30 30.x