Security Bulletin: Multiple vulnerabilities impacts AIX due to cURL libcurl (CVE-2026-1965, CVE-2026-3783, CVE-2026-3784)

Summary Multiple vulnerabilities in the curl/libcurl are related to unauthorized access. Vulnerability Details CVEID:CVE-2026-1965 DESCRIPTION: libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool o...

USN-8487-1 curl vulnerabilities

Andrew Nesbitt discovered that curl could reuse an existing live connection during STARTTLS-based connection upgrades even when the TLS configuration did not match. A remote attacker could possibly use this issue to cause curl to use an unintended TLS configuration. CVE-2026-8286 Muhamad Arga...

Security Bulletin: Vulnerability impacts AIX due to cURL libcurl (CVE-2026-5545).

Summary A logic error allows libcurl to reuse an existing Negotiate-authenticated connection even when a new request specifies different credentials for the same server. Vulnerability Details CVEID:CVE-2026-5545 DESCRIPTION: libcurl might in some circumstances reuse the wrong connection when aske...

Security update for curl

This update for curl fixes the following issues CVE-2026-4873: connection reuse ignores TLS requirement bsc1262631. CVE-2026-5545: wrong reuse of HTTP Negotiate connection bsc1262632. CVE-2026-5773: wrong reuse of SMB connection bsc1262633. CVE-2026-6253: proxy credentials leak over redirect-to...

SUSE-SU-2026:2703-1 Security update for curl

This update for curl fixes the following issues - CVE-2026-4873: connection reuse ignores TLS requirement bsc1262631. - CVE-2026-5545: wrong reuse of HTTP Negotiate connection bsc1262632. - CVE-2026-5773: wrong reuse of SMB connection bsc1262633. - CVE-2026-6253: proxy credentials leak over...

The vulnerability of the smb3_validate_negotiate() function in the fs/cifs/smb2pdu.c module of the Linux kernel file system allows a attacker to trigger a service failure.

The vulnerability of the smb3validatenegotiate function in the fs/cifs/smb2pdu.c module of the Linux kernel operating system is related to incorrect resource initialization. Exploiting this vulnerability could allow an attacker to cause a service failure...

Multiple vulnerabilities impacts AIX due to cURL libcurl (CVE-2025-14819 CVE-2026-1965 CVE-2026-3783 CVE-2026-3784 CVE-2026-5545)

IBM SECURITY ADVISORY First Issued: Fri Jun 26 01:16:13 CDT 2026 The most recent version of this document is available here: https://aix.software.ibm.com/aix/efixes/security/curladvisory10.asc Security Bulletin: Multiple vulnerabilities impacts AIX due to cURL libcurl CVE-2025-14819, CVE-2026-196...

libcurl 7.43.0 < 8.21.0 Wrong Negotiate Connection Reuse

The version of libcurl installed on the remote host is 7.43.0 prior to 8.21.0. It is, therefore, affected by an improper connection reuse vulnerability: - libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use...

UBUNTU-CVE-2026-8458

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different 'services'. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When...

CVE-2026-8458

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different 'services'. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When...

wrong reuse for different services

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different "services". libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When...

PT-2026-51746

Name of the Vulnerable Software and Affected Versions libcurl affected versions not specified Description A logical error in the connection pooling mechanism allows the software to reuse an incorrect connection for Negotiate-authenticated requests. This occurs even when the requests are configure...

SUSE-SU-2026:22156-1 Security update for curl

This update for curl fixes the following issues: - CVE-2026-4873: connection reuse ignores TLS requirement bsc1262631. - CVE-2026-5545: wrong reuse of HTTP Negotiate connection bsc1262632. - CVE-2026-6253: proxy credentials leak over redirect-to proxy bsc1262635. - CVE-2026-6276: stale custom...

OPENSUSE-SU-2026:20973-1 Security update for curl

This update for curl fixes the following issues: - CVE-2026-4873: connection reuse ignores TLS requirement bsc1262631. - CVE-2026-5545: wrong reuse of HTTP Negotiate connection bsc1262632. - CVE-2026-6253: proxy credentials leak over redirect-to proxy bsc1262635. - CVE-2026-6276: stale custom...

EulerOS Virtualization 2.13.1 : curl (EulerOS-SA-2026-2368)

According to the versions of the curl packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcu...

EulerOS Virtualization 2.13.0 : curl (EulerOS-SA-2026-2397)

According to the versions of the curl packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcu...

EulerOS 2.0 SP13 : curl (EulerOS-SA-2026-2283)

According to the versions of the curl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : libcurl can in some circumstances reuse the wrong connection when asked to dox000D an Negotiate-authenticated HTTP or HTTPS request.x000D x000D...

EulerOS 2.0 SP13 : curl (EulerOS-SA-2026-2326)

According to the versions of the curl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : libcurl can in some circumstances reuse the wrong connection when asked to dox000D an Negotiate-authenticated HTTP or HTTPS request.x000D x000D...

EulerOS 2.0 SP11 : curl (EulerOS-SA-2026-2200)

According to the versions of the curl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : 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 token to the...

EulerOS 2.0 SP11 : curl (EulerOS-SA-2026-2238)

According to the versions of the curl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : 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 token to the...