Uncontrolled Recursion Affecting postcss-selector-parser package, versions *
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Uncontrolled Recursion vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-JS-POSTCSSSELECTORPARSER-16873882
- published24 May 2026
- disclosed24 May 2026
- creditbx33661 Bpple
Introduced: 24 May 2026
NewCVE-2026-9358 (opens in a new tab)How to fix?
There is no fixed version for postcss-selector-parser.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion via the toString function in the AST Serialization. An attacker can cause uncontrolled recursion by providing specially crafted input, potentially resulting in resource exhaustion and application unavailability.