chore(deps): update dependency urllib3 to v2.5.0 [security] #3153

renovate · 2025-07-17T16:15:33Z

This PR contains the following updates:

Package	Change	Age	Confidence
urllib3 (changelog)	`==2.2.2` -> `==2.5.0`

GitHub Vulnerability Alerts

CVE-2025-50181

urllib3 handles redirects and retries using the same mechanism, which is controlled by the Retry object. The most common way to disable redirects is at the request level, as follows:

resp = urllib3.request("GET", "https://httpbin.org/redirect/1", redirect=False)
print(resp.status)

# 302

However, it is also possible to disable redirects, for all requests, by instantiating a PoolManager and specifying retries in a way that disable redirects:

import urllib3

http = urllib3.PoolManager(retries=0)  # should raise MaxRetryError on redirect
http = urllib3.PoolManager(retries=urllib3.Retry(redirect=0))  # equivalent to the above
http = urllib3.PoolManager(retries=False)  # should return the first response

resp = http.request("GET", "https://httpbin.org/redirect/1")

However, the retries parameter is currently ignored, which means all the above examples don't disable redirects.

Affected usages

Passing retries on PoolManager instantiation to disable redirects or restrict their number.

By default, requests and botocore users are not affected.

Impact

Redirects are often used to exploit SSRF vulnerabilities. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable.

Remediation

You can remediate this vulnerability with the following steps:

Upgrade to a patched version of urllib3. If your organization would benefit from the continued support of urllib3 1.x, please contact [email protected] to discuss sponsorship or contribution opportunities.
Disable redirects at the request() level instead of the PoolManager() level.

CVE-2025-50182

urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means you can use Python libraries to make HTTP requests from your browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects.

However, the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior.

Affected usages

Any code which relies on urllib3 to control the number of redirects for an HTTP request in a Pyodide runtime.

Impact

Redirects are often used to exploit SSRF vulnerabilities. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects may remain vulnerable if a Pyodide runtime redirect mechanism is unsuitable.

Remediation

If you use urllib3 in Node.js, upgrade to a patched version of urllib3.

Unfortunately, browsers provide no suitable way which urllib3 can use: XMLHttpRequest provides no control over redirects, the Fetch API returns opaqueredirect responses lacking data when redirects are controlled manually. Expect default browser behavior for redirects.

urllib3 redirects are not disabled when retries are disabled on PoolManager instantiation

CVE-2025-50181 / GHSA-pq67-6m6q-mj2v

More information

Details

urllib3 handles redirects and retries using the same mechanism, which is controlled by the Retry object. The most common way to disable redirects is at the request level, as follows:

resp = urllib3.request("GET", "https://httpbin.org/redirect/1", redirect=False)
print(resp.status)

##### 302

However, it is also possible to disable redirects, for all requests, by instantiating a PoolManager and specifying retries in a way that disable redirects:

import urllib3

http = urllib3.PoolManager(retries=0)  # should raise MaxRetryError on redirect
http = urllib3.PoolManager(retries=urllib3.Retry(redirect=0))  # equivalent to the above
http = urllib3.PoolManager(retries=False)  # should return the first response

resp = http.request("GET", "https://httpbin.org/redirect/1")

However, the retries parameter is currently ignored, which means all the above examples don't disable redirects.

Affected usages

Passing retries on PoolManager instantiation to disable redirects or restrict their number.

By default, requests and botocore users are not affected.

Impact

Redirects are often used to exploit SSRF vulnerabilities. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable.

Remediation

You can remediate this vulnerability with the following steps:

Upgrade to a patched version of urllib3. If your organization would benefit from the continued support of urllib3 1.x, please contact [email protected] to discuss sponsorship or contribution opportunities.
Disable redirects at the request() level instead of the PoolManager() level.

Severity

CVSS Score: 5.3 / 10 (Medium)
Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

urllib3 does not control redirects in browsers and Node.js

CVE-2025-50182 / GHSA-48p4-8xcf-vxj5

More information

Details

urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means you can use Python libraries to make HTTP requests from your browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects.

However, the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior.

Affected usages

Any code which relies on urllib3 to control the number of redirects for an HTTP request in a Pyodide runtime.

Impact

Redirects are often used to exploit SSRF vulnerabilities. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects may remain vulnerable if a Pyodide runtime redirect mechanism is unsuitable.

Remediation

If you use urllib3 in Node.js, upgrade to a patched version of urllib3.

Unfortunately, browsers provide no suitable way which urllib3 can use: XMLHttpRequest provides no control over redirects, the Fetch API returns opaqueredirect responses lacking data when redirects are controlled manually. Expect default browser behavior for redirects.

Severity

CVSS Score: 5.3 / 10 (Medium)
Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

Release Notes

urllib3/urllib3 (urllib3)

`v2.5.0`

Compare Source

==================

Features

Added support for the compression.zstd module that is new in Python 3.14.
See PEP 784 <https://peps.python.org/pep-0784/>_ for more information. (#3610 <https://github.com/urllib3/urllib3/issues/3610>__)
Added support for version 0.5 of hatch-vcs (#3612 <https://github.com/urllib3/urllib3/issues/3612>__)

Bugfixes

Fixed a security issue where restricting the maximum number of followed
redirects at the urllib3.PoolManager level via the retries parameter
did not work.
Made the Node.js runtime respect redirect parameters such as retries
and redirects.
Raised exception for HTTPResponse.shutdown on a connection already released to the pool. (#3581 <https://github.com/urllib3/urllib3/issues/3581>__)
Fixed incorrect CONNECT statement when using an IPv6 proxy with connection_from_host. Previously would not be wrapped in []. (#3615 <https://github.com/urllib3/urllib3/issues/3615>__)

`v2.4.0`

Compare Source

==================

Features

Applied PEP 639 by specifying the license fields in pyproject.toml. (#3522 <https://github.com/urllib3/urllib3/issues/3522>__)
Updated exceptions to save and restore more properties during the pickle/serialization process. (#3567 <https://github.com/urllib3/urllib3/issues/3567>__)
Added verify_flags option to create_urllib3_context with a default of VERIFY_X509_PARTIAL_CHAIN and VERIFY_X509_STRICT for Python 3.13+. (#3571 <https://github.com/urllib3/urllib3/issues/3571>__)

Bugfixes

Fixed a bug with partial reads of streaming data in Emscripten. (#3555 <https://github.com/urllib3/urllib3/issues/3555>__)

Misc

Switched to uv for installing development dependecies. (#3550 <https://github.com/urllib3/urllib3/issues/3550>__)
Removed the multiple.intoto.jsonl asset from GitHub releases. Attestation of release files since v2.3.0 can be found on PyPI. (#3566 <https://github.com/urllib3/urllib3/issues/3566>__)

`v2.3.0`

Compare Source

==================

Features

Applied PEP 639 by specifying the license fields in pyproject.toml. (#3522 <https://github.com/urllib3/urllib3/issues/3522>__)
Updated exceptions to save and restore more properties during the pickle/serialization process. (#3567 <https://github.com/urllib3/urllib3/issues/3567>__)
Added verify_flags option to create_urllib3_context with a default of VERIFY_X509_PARTIAL_CHAIN and VERIFY_X509_STRICT for Python 3.13+. (#3571 <https://github.com/urllib3/urllib3/issues/3571>__)

Bugfixes

Fixed a bug with partial reads of streaming data in Emscripten. (#3555 <https://github.com/urllib3/urllib3/issues/3555>__)

Misc

Switched to uv for installing development dependecies. (#3550 <https://github.com/urllib3/urllib3/issues/3550>__)
Removed the multiple.intoto.jsonl asset from GitHub releases. Attestation of release files since v2.3.0 can be found on PyPI. (#3566 <https://github.com/urllib3/urllib3/issues/3566>__)

`v2.2.3`

Compare Source

==================

Features

Added support for Python 3.13. (#3473 <https://github.com/urllib3/urllib3/issues/3473>__)

Bugfixes

Fixed the default encoding of chunked request bodies to be UTF-8 instead of ISO-8859-1.
All other methods of supplying a request body already use UTF-8 starting in urllib3 v2.0. (#3053 <https://github.com/urllib3/urllib3/issues/3053>__)
Fixed ResourceWarning on CONNECT with Python < 3.11.4 by backporting https://github.com/python/cpython/issues/103472. (#3252 <https://github.com/urllib3/urllib3/issues/3252>__)
Adjust tolerance for floating-point comparison on Windows to avoid flakiness in CI (#3413 <https://github.com/urllib3/urllib3/issues/3413>__)
Fixed a crash where certain standard library hash functions were absent in restricted environments. (#3432 <https://github.com/urllib3/urllib3/issues/3432>__)
Fixed mypy error when adding to HTTPConnection.default_socket_options. (#3448 <https://github.com/urllib3/urllib3/issues/3448>__)

HTTP/2 (experimental)

HTTP/2 support is still in early development.

Excluded Transfer-Encoding: chunked from HTTP/2 request body (#3425 <https://github.com/urllib3/urllib3/issues/3425>__)
Added version checking for h2 (https://pypi.org/project/h2/) usage.

Now only accepting supported h2 major version 4.x.x. (#3290 <https://github.com/urllib3/urllib3/issues/3290>__)
Added a probing mechanism for determining whether a given target origin
supports HTTP/2 via ALPN. (#3301 <https://github.com/urllib3/urllib3/issues/3301>__)
Add support for sending a request body with HTTP/2 (#3302 <https://github.com/urllib3/urllib3/issues/3302>__)

Deprecations and Removals

Note for downstream distributors: the _version.py file has been removed and is now created at build time by hatch-vcs. (#3412 <https://github.com/urllib3/urllib3/issues/3412>__)
Drop support for end-of-life PyPy3.8 and PyPy3.9. (#3475 <https://github.com/urllib3/urllib3/issues/3475>__)

Configuration

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openshift-ci · 2025-07-17T16:15:41Z

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openshift-ci · 2025-07-17T16:15:46Z

Hi @renovate[bot]. Thanks for your PR.

I'm waiting for a redhat-developer member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

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renovate bot added kind/dependency upgrade kind/security labels Jul 17, 2025

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chore(deps): update dependency urllib3 to v2.5.0 [security]

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GitHub Vulnerability Alerts

CVE-2025-50181

Affected usages

Impact

Remediation

CVE-2025-50182

Affected usages

Impact

Remediation

urllib3 redirects are not disabled when retries are disabled on PoolManager instantiation

Details

Affected usages

Impact

Remediation

Severity

References

urllib3 does not control redirects in browsers and Node.js

Details

Affected usages

Impact

Remediation

Severity

References

Release Notes

v2.5.0

Features

Bugfixes

v2.4.0

Features

Bugfixes

Misc

v2.3.0

Features

Bugfixes

Misc

v2.2.3

Features

Bugfixes

HTTP/2 (experimental)

Deprecations and Removals

Configuration

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`v2.5.0`

`v2.4.0`

`v2.3.0`

`v2.2.3`