CVE-2021-26813: PYSEC-2021-20 - markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicio

CVE-2021-26813 · Severity: low · CVSS 3.1 · Published 2021-03-03

Technologies: markdown2 (PyPI). Vendors: PyPI.

Executive brief

markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.

Affected products

PyPI markdown2

Related threats

PYSEC-2020-65 - python-markdown2 through 2.3.8 allows XSS because element names are mishandled unless a \w+ match succeeds. For example, an attack might use
PYSEC-2020-235 - python-markdown2 before 1.0.1.14 has multiple cross-site scripting (XSS) issues.
PYSEC-2018-13 - An issue was discovered in markdown2 (aka python-markdown2) through 2.3.5. The safe_mode feature, which is supposed to sanitize user input a