EUVD-2026-94640

The AsyncHttpClient AHC library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, the HTTP/1.1 connection-pool key excludes the authenticated principal for connection-oriented NTLM and Negotiate authentication. A pooled...

AlmaLinux 9.6 [TuxCare] Security Update: curl / curl-minimal / libcurl / libcurl-devel / libcurl-minimal Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1773939685)

The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1773939685 advisory. - libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request...

AlmaLinux 9.6 [TuxCare] Security Update: curl / curl-minimal / libcurl / libcurl-devel / libcurl-minimal (ALMALINUX9.6:CLSA-2026:1778889816)

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1778889816 advisory. - libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTPS request after a...

AlmaLinux 9.2 [TuxCare] Security Update: curl / curl-minimal / libcurl / libcurl-devel / libcurl-minimal Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1773938530)

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1773938530 advisory. - libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request...

CentOS Linux 8.5 [TuxCare] Security Update: curl / curl-minimal / libcurl / libcurl-devel / libcurl-minimal Multiple Vulnerabilities (CENTOS8.5:CLSA-2026:1774259901)

The CentOS Linux 8.5 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS8.5:CLSA-2026:1774259901 advisory. - libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request...

Rocky Linux 9.6 [TuxCare] Security Update: curl / curl-minimal / libcurl / libcurl-devel / libcurl-minimal Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1773939685)

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1773939685 advisory. - libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request...

Rocky Linux 9.6 [TuxCare] Security Update: curl / curl-minimal / libcurl / libcurl-devel / libcurl-minimal (ALMALINUX9.6:CLSA-2026:1778889816)

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1778889816 advisory. - libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTPS request after a...

CentOS Linux 8 [TuxCare] Security Update: curl / curl-minimal / libcurl / libcurl-devel / libcurl-minimal Multiple Vulnerabilities (CENTOS-STREAM8:CLSA-2026:1774366368)

The CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS-STREAM8:CLSA-2026:1774366368 advisory. - libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request...

USN-8487-2 curl regression

USN-8487-1 fixed vulnerabilities in curl. Unfortunately that update contained an incomplete fix for CVE-2026-8927. This update fixes the problem. Original advisory details: Andrew Nesbitt discovered that curl could reuse an existing live connection during STARTTLS-based connection upgrades even...

curl: curl: Authentication bypass due to incorrect connection reuse with Negotiate authentication

A flaw was found in curl. When an application uses libcurl to make multiple Negotiate-authenticated HTTP or HTTPS requests to the same server with different credentials, libcurl may incorrectly reuse an existing connection. This logical error can cause a subsequent request to be sent using the...

OESA-2026-4127 curl security update

cURL is a computer software project providing a library libcurl and command-line tool curl for transferring data using various protocols. Security Fixes: Successfully using libcurl to do a transfer to a specific HTTP origin hostA with Digest authentication and then changing the origin to a...

OESA-2026-4128 curl security update

cURL is a computer software project providing a library libcurl and command-line tool curl for transferring data using various protocols. Security Fixes: Successfully using libcurl to do a transfer to a specific HTTP origin hostA with Digest authentication and then changing the origin to a...

OESA-2026-4124 curl security update

cURL is a computer software project providing a library libcurl and command-line tool curl for transferring data using various protocols. Security Fixes: Successfully using libcurl to do a transfer to a specific HTTP origin hostA with Digest authentication and then changing the origin to a...

OESA-2026-4125 curl security update

cURL is a computer software project providing a library libcurl and command-line tool curl for transferring data using various protocols. Security Fixes: Successfully using libcurl to do a transfer to a specific HTTP origin hostA with Digest authentication and then changing the origin to a...

CVE-2026-19931

A flaw was found in libcurl. This vulnerability allows an attacker to reuse an HTTP connection set up for a given hostname using Negotiate authentication. When an initial request is made with empty credentials, a subsequent user's request can be sent over a previously authenticated connection...

AZL-99870 CVE-2026-19931 affecting package tensorflow 2.16.1-11

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection...

AZL-99843 CVE-2026-19931 affecting package rust 1.90.0-10

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection...

ALPINE-CVE-2026-19931

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection...

AZL-99777 CVE-2026-19931 affecting package cmake 3.30.3-15

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection...

CVE-2026-19931

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection...