Inefficient Regular Expression Complexity Affecting az package, versions <2.79.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-CHAINGUARDLATEST-AZ-14885405
- published7 Jan 2026
- disclosed20 Aug 2025
Introduced: 20 Aug 2025
CVE-2025-54364 (opens in a new tab)How to fix?
Upgrade Chainguard az to version 2.79.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream az package and not the az package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
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.