Open Redirect Affecting urllib3 package, versions [,2.5.0)
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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Test your applications- Snyk IDSNYK-PYTHON-URLLIB3-10390194
- published19 Jun 2025
- disclosed18 Jun 2025
- creditJacob Sandum
Introduced: 18 Jun 2025
NewCVE-2025-50181 (opens in a new tab)How to fix?
Upgrade urllib3 to version 2.5.0 or higher.
Overview
urllib3 is a HTTP library with thread-safe connection pooling, file post, and more.
Affected versions of this package are vulnerable to Open Redirect due to the retries parameter being ignored during PoolManager instantiation. An attacker can access unintended resources or endpoints by leveraging automatic redirects when the application expects redirects to be disabled at the connection pool level.
Note:
requests and botocore users are not affected.
Workaround
This can be mitigated by disabling redirects at the request() level instead of the PoolManager() level.