Homepage

Inefficient Regular Expression Complexity The advisory has been revoked - it doesn't affect any version of package python-jinja2.src  (opens in a new tab)

Threat Intelligence

EPSS
0.21% (44th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL10-PYTHONJINJA2SRC-15338087
  • published24 Feb 2026
  • disclosed1 Jan 2020
Report a new vulnerability Found a mistake?

Introduced: 1 Jan 2020

CVE-2020-28493  (opens in a new tab)
CWE-1333  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-jinja2.src package and not the python-jinja2.src package as distributed by RHEL.

This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the _punctuation_re regex operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.