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Mistune vulnerable to catastrophic backtracking

High severity GitHub Reviewed Published Jul 26, 2022 to the GitHub Advisory Database • Updated Aug 17, 2023

Package

pip mistune (pip)

Affected versions

>= 2.0.0, < 2.0.3

Patched versions

2.0.3

Description

In Mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.

References

Published by the National Vulnerability Database Jul 25, 2022
Published to the GitHub Advisory Database Jul 26, 2022
Reviewed Jul 29, 2022
Last updated Aug 17, 2023

Severity

High
8.6
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Weaknesses

CVE ID

CVE-2022-34749

GHSA ID

GHSA-fw3v-x4f2-v673

Source code

Credits

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