VULNERABILITY INTELLIGENCE

CVE-2020-5238

CVSS score6.5 MEDIUM
EPSS probability1.57%
CISA KEVNot currently listed
Published2020-07-01
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project. The issue has been fixed in version 0.29.0.gfm.1.

Weakness classification

  • security-advisories@github.com: CWE-20
  • nvd@nist.gov: CWE-20

Primary references