Regular Expression Denial of Service in Microsoft Knack
CVE-2025-54364

6.9MEDIUM

Key Information:

Vendor

Microsoft
Status
Knack
Vendor
CVE Published:
20 August 2025

What is CVE-2025-54364?

The Microsoft Knack 0.12.0 version contains a vulnerability within the knack.introspection module that exposes applications to Regular Expression Denial of Service (ReDoS) attacks. This can allow an attacker to send carefully crafted inputs that take an excessive amount of time to process, leading to service unavailability. Developers using this version should review their implementations of the Knack library to mitigate potential risks arising from these types of attacks. More information can be found in the official advisory.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

Knack 0.12.0

References

https://github.com/microsoft/knack
https://www.vulncheck.com/advisories/microsoft-knack-pyth...

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.