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GHSA-g3rq-g295-4j3m

Regular Expression Denial of Service (ReDoS) in Jinja2

Source: GitHub Advisory Database (reviewed) Moderate CVE-2020-28493

Packages

EcosystemPackageAffectedFixed in
PyPI Jinja2 < 2.11.3 2.11.3

Details

As written in the advisory (Markdown source, shown as plain text).

This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDOS vulnerability of the regex is mainly due to the sub-pattern [a-zA-Z0-9._-]+.[a-zA-Z0-9._-]+ 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.

References

External links from the advisory. They lead to third-party sites.