CVE-2025-54364

Description

Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module. option_descriptions employs an inefficient regular expression pattern: "\s(:param)\s+(.+?)\s:(.*)" that is susceptible to catastrophic backtracking when processing crafted docstrings containing a large volume of whitespace without a terminating colon. An attacker who can control or inject docstring content into affected applications can trigger excessive CPU consumption. This software is used by Azure CLI.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.16%
Affected: Microsoft Knack
Published at:
Updated at:

References

Link Tags
https://github.com/microsoft/knack
https://www.vulncheck.com/advisories/microsoft-knack-python-package-regular-expression-dos

Frequently Asked Questions

What is the severity of CVE-2025-54364?
CVE-2025-54364 has been scored as a medium severity vulnerability.
How to fix CVE-2025-54364?
To fix CVE-2025-54364, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-54364 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-54364 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-54364?
CVE-2025-54364 affects Microsoft Knack.
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