🛡️ CVE-2025-54363 — knack

🟢 CVSS 2.0 — Low ✅ No Known Exploit CWE-1333 NVD
2.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Withdrawn Advisory: Microsoft Knack ReDoS Vulnerability in the Introspection Module ### Withdrawn Advisory This advisory has been withdrawn because the attack surface of this vulnerability is outside of Knack's intended functionality. The maintainer states the following: > These CVEs are invalid. Knack is a CLI framework used by [Azure CLI](https://github.com/Azure/azure-cli). It's a local library, not a web service. In addition, the regex is used to extract function and parameter docstrings from the source code. It is not used to match user input. Therefore, it does not expose any attack surface. There is no way to use it for ReDoS attack. This link is maintained to preserve external references. ### Original Description Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module (issue 1 of 2).

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability low.

Weakness class

CVE-2025-54363 is classified as CWE-1333: Inefficient Regular Expression Complexity. A regular expression backtracks catastrophically on crafted input, consuming CPU out of proportion to input size.

Affected software and timeline

Affected software: knack and unknown. Published on 20 August 2025 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
www.vulncheck.com (Web)

CVE-2025-54363 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity LOW
CVSS Score 2.0
CVSS Vector CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
CWE CWE-1333
Public Exploit ✅ No
Source NVD
Published 2025-08-20
Updated 2026-08-12
Modified 2026-02-04
Fix URL N/A

Affected Packages

Software From version Fixed in
knack — —
unknown — —

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More CVE 2025 advisories

Part of CVE 2025 in the advisory index.