How severe is CVE-2025-50182?

CVE-2025-50182 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-50182 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-50182?

CVE-2025-50182 affects Python Urllib3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-50182?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-50182 have an EU (EUVD) identifier?

Yes. CVE-2025-50182 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18677.

When was CVE-2025-50182 published?

CVE-2025-50182 was published on 2025-06-19 and last updated on 2026-06-17.

CVE-2025-50182

CVE-2025-50182 is a medium-severity vulnerability in Python Urllib3 with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18677
Weakness: CWE-601
Affected product: Python Urllib3
Published: 2025-06-19
Last modified: 2026-06-17

Description

urllib3 is a user-friendly HTTP client library for Python. Starting in version 2.2.0 and prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0.

Frequently asked questions

What is CVE-2025-50182?: urllib3 is a user-friendly HTTP client library for Python. Starting in version 2.2.0 and prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0.
How severe is CVE-2025-50182?: CVE-2025-50182 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-50182 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-50182?: CVE-2025-50182 affects Python Urllib3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-50182?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-50182 have an EU (EUVD) identifier?: Yes. CVE-2025-50182 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18677.
When was CVE-2025-50182 published?: CVE-2025-50182 was published on 2025-06-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*

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