← Vulnerability feed

Vulnerability record · CVE-2025-50181 · published 19 June 2025

CVE-2025-50181: Python urllib3 open redirect vulnerability

Python · Urllib3

urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, it is possible to disable redirects for all requests by instantiating a PoolManager and specifying retries in a way that disable redirects. By default, requests and botocore users are not affected. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable. This issue has been patched in version 2.5.0.

6.1 CVSS 3.1 Medium EPSS 0.47% · top 61.5% CWE-601 · Open redirect
6.1CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, it is possible to disable redirects for all requests by instantiating a PoolManager and specifying retries in a way that disable redirects. By default, requests and botocore users are not affected. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable. This issue has been patched in version 2.5.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/urllib3/urllib3/commit/f05b1329126d5be6de501f9d1e3e36738bc08857 Patch
https://github.com/urllib3/urllib3/releases/tag/2.5.0
https://github.com/urllib3/urllib3/security/advisories/GHSA-pq67-6m6q-mj2v ExploitVendor Advisory

Track CVE-2025-50181 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-20060Python urllib3 vulnerabilityurllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in ho…EPSS 4.5%8.9CVE-2026-44432Python urllib3 vulnerabilityurllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portio…EPSS 0.88%8.9CVE-2026-21441Python urllib3 vulnerabilityurllib3 is an HTTP client library for Python. urllib3's streaming API is designed for the efficient handling of large HTTP responses by reading the c…EPSS 3.0%8.9CVE-2025-66471Python urllib3 vulnerabilityurllib3 is a user-friendly HTTP client library for Python. Starting in version 1.0 and prior to 2.6.0, the Streaming API improperly handles highly co…EPSS 0.68%8.9CVE-2025-66418Python urllib3 allocation without limits vulnerabilityurllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chai…EPSS 0.68%8.2CVE-2026-44431Python urllib3 information exposure vulnerabilityurllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.conn…EPSS 0.34%8.1CVE-2023-43804Python urllib3 information exposure vulnerabilityurllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing…EPSS 1.2%7.5CVE-2021-33503Python urllib3 uncontrolled resource consumption vulnerabilityAn issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority reg…EPSS 3.3%

Source: NIST National Vulnerability Database (record CVE-2025-50181), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.