netrc credential leak with reused proxy connection

When asked to both use a .netrc file for credentials and to follow HTTP redirects, libcurl could leak the password used for the first host to the followed-to host under certain circumstances...

PT-2026-35896

Name of the Vulnerable Software and Affected Versions libcurl affected versions not specified Description When configured to use a .netrc file for credentials and to follow HTTP redirects, libcurl may leak the password used for the initial host to the subsequent host during the redirect process...

Insertion of Sensitive Information Into Sent Data

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the reuse of a proxy connection during HTTP redirects when using .netrc for credentials. An attacker can obtain sensitive credential information by intercepting traffic if both the...

curl: libcurl omits IPv6 zoneid from host identity and leaks credentials/cookies across scoped link-local realms

Summary: libcurl omits the IPv6 zoneid component from multiple security-sensitive host identity decisions even though the connection layer still routes by zoneid. As a result, two distinct scoped/link-local destinations such as fe80::X%zoneA and fe80::X%zoneB are treated as the same host by...

curl: Digest Auth State Leak on Cross-Origin Redirect via Netrc - Username and Password Hash Sent to Wrong Host

Summary When curl follows an HTTP redirect from hostA to hostB using --netrc --digest -L, Digest authentication state nonce, realm from hostA persists and is combined with hostB's netrc credentials to generate an unsolicited Digest Authorization header sent to hostB. This leaks hostB's username i...

curl: CVE-2026-6429: netrc credential leak with reused proxy connection

Summary: libcurl can leak .netrc-derived host Authorization credentials across redirected hosts when an HTTP proxy connection is reused. In the PoC, .netrc contains credentials only for a.test, but after a.test redirects to b.test and then c.test over the same keep-alive proxy connection, libcurl...

curl: curl: Information disclosure via OAuth2 bearer token leakage during HTTP(S) redirect

A flaw was found in curl. When an OAuth2 bearer token is used for an HTTPS transfer that redirects to a second URL, curl could unintentionally leak the token. This occurs if the second hostname has entries in the .netrc file, allowing the bearer token intended for the first host to be sent to the...

Security Bulletin: IBM Cloud Pak for Data System (CPDS 1.0) is affected by credential disclosure due to Python Requests library

Summary The Python Requests library is used by IBM Cloud Pak for Data System 1.0 to handle HTTP communications. CVE-2024-47081 affects Requests due to a URL parsing issue that may leak .netrc credentials to third parties when processing maliciously-crafted URLs. This vulnerability could result in...

CLSA-2026-1773939685 curl: Fix of CVE-2026-3783

CVE-2026-3783: prevent bearer token leak on HTTPS redirect when .netrc contains entries for the redirected host...

CLSA-2026-1774366368 curl: Fix of 3 CVEs

CVE-2026-1965: fix incorrect connection reuse; prevent reuse of Negotiate- authenticated connections with different credentials and require authentication identity match - CVE-2026-3784: fix wrong proxy connection reuse with different credentials; check proxy user/password in proxyinfomatches to...

SUSE-SU-2026:20760-1 Security update for curl

This update for curl fixes the following issues: - CVE-2026-1965: bad reuse of HTTP Negotiate connection bsc1259362. - CVE-2026-3783: token leak with redirect and netrc bsc1259363. - CVE-2026-3784: wrong proxy connection reuse with credentials bsc1259364. - CVE-2026-3805: use after free in SMB...

CLSA-2026-1773938530 curl: Fix of CVE-2026-3783

CVE-2026-3783: prevent bearer token leak on HTTPS redirect when .netrc contains entries for the redirected host...

Security update for curl

This update for curl fixes the following issues: CVE-2026-1965: bad reuse of HTTP Negotiate connection bsc1259362. CVE-2026-3783: token leak with redirect and netrc bsc1259363. CVE-2026-3784: wrong proxy connection reuse with credentials bsc1259364. Patch Instructions: To install this SUSE update...

Security update for curl

This update for curl fixes the following issues: CVE-2026-1965: bad reuse of HTTP Negotiate connection bsc1259362. CVE-2026-3783: token leak with redirect and netrc bsc1259363. CVE-2026-3784: wrong proxy connection reuse with credentials bsc1259364. CVE-2026-3805: use after free in SMB connection...

curl: Bearer Token Leaked to Attacker via .netrc Despite CVE-2026-3783 Fix

curl versions 8.19.0 and later were meant to fix CVE-2026-3783, which causes OAuth2 bearer tokens to leak on HTTP redirects when the user has a .netrc file configured. However, the vulnerability still exists in the current codebase. VULNERABILITY: When a curl user specifies an OAuth2 bearer token...

SUSE-SU-2026:0903-1 Security update for curl

This update for curl fixes the following issues: - CVE-2026-1965: bad reuse of HTTP Negotiate connection bsc1259362. - CVE-2026-3783: token leak with redirect and netrc bsc1259363. - CVE-2026-3784: wrong proxy connection reuse with credentials bsc1259364. - CVE-2026-3805: use after free in SMB...

Curl 7.33.0 < 8.19.0 Token Leak with Redirect and Netrc

The version of curl installed on the remote host is 7.33.0 prior to 8.19.0. It is, therefore, affected by a token leak with redirect and netrc vulnerability: - When an OAuth2 bearer token is used for an HTTPS transfer, and that transfer performs a redirect to a second URL, curl could leak that...

Huawei EulerOS: Security Advisory for python-requests (EulerOS-SA-2026-1458)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Huawei EulerOS: Security Advisory for python-requests (EulerOS-SA-2026-1515)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

EulerOS Virtualization 2.12.0 : python-requests (EulerOS-SA-2026-1515)

According to the versions of the python-requests package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : Requests is a HTTP library. Due to a URL parsing issue, Requests releases prior to 2.32.4 may leak .netrc credentials to...