urllib3: urllib3: Denial of Service due to excessive HTTP response decompression

A flaw was found in urllib3, an HTTP client library for Python. This vulnerability allows a remote attacker to cause excessive resource consumption, such as high CPU usage and massive memory allocation, on the client side. This occurs when urllib3 attempts to decompress an entire HTTP response,...

CVE-2026-59939

httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small...

Astra Linux – Vulnerability in python-urllib3

urllib3 is a user-friendly HTTP client library for Python. urllib3 does not treat the Cookie HTTP header specially or provides any helpers for managing cookies over HTTP; that responsibility lies with the user. However, it is possible for a user to specify a Cookie header, and inadvertently leak...

cpython: Incomplete control character validation in http.cookies

A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update, |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.jsoutput lacked the output...

OESA-2026-2299 python-urllib3 security update

HTTP library with thread-safe connection pooling, file post support, sanity friendly, and more. Security Fixes: urllib3 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.connectionfromurl.urlopen...,...

cpython: Incomplete control character validation in http.cookies

A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update, |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.jsoutput lacked the output...

Security Bulletin: Vulnerabilities in urllib3, router, qs, cryptography, axios might affect IBM Storage Defender Sentinel Anomaly Scan Engine.

Summary IBM Storage Defender Sentinel Anomaly Scan Engine can be affected by vulnerabilities in urllib3, router, qs, cryptography, and axios. Vulnerabilities include allowing an attacker to cause cross-site scripting, input improper data, provide a public key point from a small order subgroup, an...

curl_cffi 代码问题漏洞

curlcffi is a Python HTTP client library developed by Lexiforest personal developers, which supports browser fingerprint simulation. Versions of curlcffi prior to 0.15.0 have code vulnerabilities. These vulnerabilities stem from the lack of restrictions on requests directed to internal IP ranges,...

Security Bulletin: IBM Sterling Control Center is affected by vulnerabilities in urllib3 (CVE-2026-21441, CVE-2025-66471)

Summary IBM Sterling Control Center is affected by a vulnerability CVE-2026-21441, CVE-2025-66471 reported for urllib3. Vulnerability Details CVEID:CVE-2026-21441 DESCRIPTION: urllib3 is an HTTP client library for Python. urllib3's streaming API is designed for the efficient handling of large HTT...

OESA-2026-1251 python-urllib3 security update

HTTP library with thread-safe connection pooling, file post support, sanity friendly, and more. Security Fixes: urllib3 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 chain was unbounded allowing a malicious...

PT-2026-2060

Name of the Vulnerable Software and Affected Versions urllib3 versions 1.22 through 2.6.2 Description urllib3 is a Python HTTP client library. Its streaming API is designed for efficient handling of large HTTP responses by reading content in chunks. The library decompresses content based on the...

Linux Distros Unpatched Vulnerability : CVE-2025-69224

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below of the Python HTTP parser may allow a request smugglin...

Security Bulletin: Vulnerability in urllib3 affects IBM Cloud Pak for Data System 2.0 (CPDS 2.0)[CVE-2023-43804, CVE-2023-45803]

Summary The urllib3 package is used by IBM Cloud Pak for Data System 2.0 . IBM Cloud Pak for Data System 2.0 has addressed the applicable CVEsCVE-2023-43804, CVE-2023-45803 Vulnerability Details CVEID:CVE-2023-43804 DESCRIPTION: urllib3 is a user-friendly HTTP client library for Python. urllib3...

EUVD-2025-201419

urllib3 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 compressed data. urllib3's streaming API is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than...

CVE-2025-13836

A flaw was found in the http.client module in the Python standard library. When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This issue allows a malicious server to cause the client to read large amounts of data into...

Siemens SIMATIC S7-1500 URL Redirection to Untrusted Site (CVE-2021-28861)

Python 3.x through 3.10 has an open redirection vulnerability in lib/http/server.py due to no protection against multiple / at the beginning of URI path which may leads to information disclosure. NOTE: this is disputed by a third party because the http.server.html documentation page states Warnin...

Security Bulletin: IBM watsonx Orchestrate Developer Edition affected by vulnerability in python3-pip-wheel python3.12-pip python3.12-pip-wheel urllib3

Summary Security Bulletin: IBM watsonx Orchestrate Developer Edition affected by vulnerability in python3-pip-wheel python3.12-pip python3.12-pip-wheel urllib3 Vulnerability Details CVEID:CVE-2025-50182 DESCRIPTION: urllib3 is a user-friendly HTTP client library for Python. Starting in version...

aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators

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CVE-2025-50182 urllib3 does not control redirects in browsers and Node.js

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-urllib3 security update

An update is available for python-urllib3. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The python-urllib3 package provides the Python HTTP module with...