Uncontrolled Recursion Affecting fastfeedparser package, versions [,0.5.10)
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.
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-PYTHON-FASTFEEDPARSER-15954312
- published9 Apr 2026
- disclosed8 Apr 2026
- creditredyank
Introduced: 8 Apr 2026
CVE-2026-39376 (opens in a new tab)How to fix?
Upgrade fastfeedparser to version 0.5.10 or higher.
Overview
fastfeedparser is a High performance RSS, Atom, JSON and RDF feed parser in Python
Affected versions of this package are vulnerable to Uncontrolled Recursion through the parse function when processing HTML responses containing a <meta http-equiv="refresh"> tag, which leads to unbounded recursion without a redirect depth limit or visited-URL tracking. An attacker can exhaust system resources and cause a crash by supplying a URL that triggers an infinite chain of meta-refresh redirects.