urllib's cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage

Summary urllib supports redirect-following through followRedirect, which is expected behavior for an HTTP client. The issue is that, when following a redirect to a different origin, urllib preserves the caller-supplied request headers verbatim, including credential-bearing headers such as...

CVE-2026-55553 urllib: Cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, requestInternal recursively calls...

EUVD-2026-65613

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, requestInternal recursively calls...

CVE-2026-55553

urllib is an HTTP client for Node.js. Prior to versions 2.44.1 and 4.9.1 , its redirect-following logic in src/HttpClient.ts reuses caller-supplied options across origin boundaries. When #requestInternal recursively processes a redirect to a different scheme, host, or port, headers such as Author...

CVE-2026-55553 urllib: Cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, requestInternal recursively calls...

urllib3: urllib3: Information disclosure via cross-origin redirects forwarding sensitive headers

A flaw was found in urllib3, an HTTP client library for Python. When using the low-level API via ProxyManager.connectionfromurl.urlopen with assertsamehost=False, cross-origin redirects can still forward sensitive headers. This could allow a remote attacker to gain unauthorized access to sensitiv...

Important: Red Hat Security Advisory: python-urllib3 security update

An update for python-urllib3 is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

PT-2026-81566

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An observable discrepancy in PerformanceAPIs allows a remote attacker to potentially obtain cross-origin data through the use of a crafted HTML page. Cross-origin data refers to...

PT-2026-81569

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An uninitialized resource in Skia allows a remote attacker who has compromised the renderer process to potentially obtain cross-origin data through a crafted HTML page. Skia is a 2D...

PT-2026-81576

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An uninitialized resource in ANGLE, a graphics abstraction layer, allows a remote attacker to obtain cross-origin data by using a crafted HTML page. Recommendations Update Google Chrome...

PT-2026-81592

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An uninitialized resource in the GPU allows a remote attacker who has compromised the renderer process to potentially obtain cross-origin data through a crafted HTML page. Recommendatio...

PT-2026-81548

Name of the Vulnerable Software and Affected Versions Google Chrome on Android versions prior to 152.0.7977.65 Description An observable discrepancy in CustomTabs allows a local attacker to obtain cross-origin data through a co-installed application. Cross-origin data refers to information...

PT-2026-81527

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An information leak exists in the StorageAccessAPI, which allows a remote attacker to obtain cross-origin data by using a crafted HTML page. Recommendations Update Google Chrome to...

PT-2026-81724

Name of the Vulnerable Software and Affected Versions Google Chrome on Android versions prior to 152.0.7977.65 Description An information leak exists in CustomTabs, which allows a local attacker to obtain cross-origin data through a co-installed application. Cross-origin data refers to informatio...

PT-2026-81561

Name of the Vulnerable Software and Affected Versions Google Chrome on Android versions prior to 152.0.7977.65 Description An observable discrepancy in CustomTabs allows a local attacker to obtain cross-origin data through a co-installed application. Cross-origin data refers to information...

PT-2026-81833

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An information leak in the GPU allows a remote attacker to obtain cross-origin data, which is data from a different origin than the one serving the page, by using a crafted HTML page...

PT-2026-81631

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An information leak exists in the Cross-Origin Resource Sharing CORS implementation. A remote attacker who has already compromised the renderer process can leak cross-origin data by usi...

PT-2026-81614

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An observable discrepancy in the Scalable Vector Graphics SVG implementation allows a remote attacker to obtain cross-origin data by using a crafted HTML page. Recommendations Update...

PT-2026-81812

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An information leak exists in the ServiceWorker, which allows a remote attacker to obtain cross-origin data by using a crafted HTML page. ServiceWorker is a script that the browser runs...

EulerOS Virtualization 2.13.0 : python-urllib3 (EulerOS-SA-2026-3234)

According to the versions of the python-urllib3 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level...