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Findings

CVE-2018-20843

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU r…

Published Jun 24, 2019 · updated Oct 14, 2026 · libexpat project libexpat

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

Timeline

Detection, updates, and resolution for this record.

  1. Jun 24, 2019 · NIST NVD

    Detected

    In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

  2. Oct 14, 2026 · NIST NVD

    Updated

    In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

Affected

  • cpe canonical/ubuntu linux12.04
  • cpe canonical/ubuntu linux14.04
  • cpe canonical/ubuntu linux16.04
  • cpe canonical/ubuntu linux18.04
  • cpe canonical/ubuntu linux18.10
  • cpe canonical/ubuntu linux19.04
  • cpe debian/debian linux8.0
  • cpe fedoraproject/fedora29
  • cpe libexpat project/libexpatversion unspecified
  • cpe opensuse/leap15.0
  • cpe oracle/hospitality res 3700version unspecified
  • cpe tenable/nessusversion unspecified

Sources

  • NIST NVDCVE-2018-20843

    In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

    nvd.nist.gov

References