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CVE-2026-1965

Опубликовано: 11 мар. 2026
Источник: redhat
CVSS3: 6.8
EPSS Низкий

Описание

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 authentication of a previous user, leading to an authentication bypass.

Меры по смягчению последствий

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Затронутые пакеты

ПлатформаПакетСостояниеРекомендацияРелиз
Confidential Compute Attestationbuild-of-trustee/trustee-rhel9Fix deferred
Confidential Compute Attestationconfidential-compute-attestation-tech-preview/trustee-rhel9Fix deferred
Confidential Compute Attestationopenshift-sandboxed-containers/osc-operator-bundleFix deferred
Confidential Compute Attestationopenshift-sandboxed-containers/osc-podvm-builder-rhel9Fix deferred
Confidential Compute Attestationopenshift-sandboxed-containers/osc-podvm-payload-rhel9Fix deferred
Confidential Compute Attestationopenshift-sandboxed-containers/osc-rhel9-operatorFix deferred
Logging Subsystem for Red Hat OpenShiftopenshift-logging/cluster-logging-operator-bundleFix deferred
Logging Subsystem for Red Hat OpenShiftopenshift-logging/cluster-logging-rhel9-operatorFix deferred
Logging Subsystem for Red Hat OpenShiftopenshift-logging/eventrouter-rhel9Fix deferred
Logging Subsystem for Red Hat OpenShiftopenshift-logging/fluentd-rhel9Fix deferred

Показывать по

Дополнительная информация

Статус:

Moderate
Дефект:
CWE-303
https://bugzilla.redhat.com/show_bug.cgi?id=2446448curl: curl: Authentication bypass due to incorrect connection reuse with Negotiate authentication

EPSS

Процентиль: 17%
0.00054
Низкий

6.8 Medium

CVSS3

Связанные уязвимости

CVSS3: 6.5
ubuntu
17 дней назад

libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criterion must first be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different credentials. One underlying reason being that Negotiate sometimes authenticates *connections* and not *requests*, contrary to how HTTP is designed to work. An application that allows Negotiate authentication to a server (that responds wanting Negotiate) with `user1:password1` and then does another operation to the same server also using Negotiate but with `user2:password2` (while the previous connection is still alive) - the second request wrongly reused the same connection and since it t...

CVSS3: 6.5
nvd
17 дней назад

libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criterion must first be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different credentials. One underlying reason being that Negotiate sometimes authenticates *connections* and not *requests*, contrary to how HTTP is designed to work. An application that allows Negotiate authentication to a server (that responds wanting Negotiate) with `user1:password1` and then does another operation to the same server also using Negotiate but with `user2:password2` (while the previous connection is still alive) - the second request wrongly reused the same connection and since it t

msrc
16 дней назад

bad reuse of HTTP Negotiate connection

CVSS3: 6.5
debian
17 дней назад

libcurl can in some circumstances reuse the wrong connection when aske ...

CVSS3: 6.5
github
17 дней назад

libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criterion must first be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different credentials. One underlying reason being that Negotiate sometimes authenticates *connections* and not *requests*, contrary to how HTTP is designed to work. An application that allows Negotiate authentication to a server (that responds wanting Negotiate) with `user1:password1` and then does another operation to the same server also using Negotiate but with `user2:password2` (while the previous connection is still alive) - the second request wrongly reused the same connection and since i...

EPSS

Процентиль: 17%
0.00054
Низкий

6.8 Medium

CVSS3