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CVE-2026-4873

Опубликовано: 29 апр. 2026
Источник: redhat
CVSS3: 5.3
EPSS Низкий

Описание

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.

A flaw was found in curl. A remote attacker could exploit this by initiating an unencrypted connection (via IMAP, SMTP, or POP3) and then making a subsequent request to the same host that requires Transport Layer Security (TLS). Due to incorrect connection reuse, the subsequent request would bypass the TLS requirement, leading to the transmission of sensitive information in cleartext. This vulnerability, categorized as Cleartext Transmission of Sensitive Information (CWE-319), results in information disclosure.

Отчет

Moderate: This flaw in curl allows for information disclosure when an unencrypted connection is incorrectly reused for a subsequent request that expects TLS. This can lead to the cleartext transmission of sensitive data, potentially affecting Red Hat products that utilize curl for IMAP, SMTP, or POP3 connections where connection reuse is enabled.

Меры по смягчению последствий

To mitigate this issue, avoid using clear-text IMAP, POP3, or SMTP transfers with curl. Ensure that all connections for these protocols are initiated with TLS from the outset to prevent the reuse of unencrypted connections.

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-319
https://bugzilla.redhat.com/show_bug.cgi?id=2461200curl: curl: Information disclosure due to incorrect TLS connection reuse

EPSS

Процентиль: 25%
0.00329
Низкий

5.3 Medium

CVSS3

Связанные уязвимости

CVSS3: 5.9
ubuntu
3 месяца назад

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.

CVSS3: 5.9
nvd
3 месяца назад

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.

CVSS3: 5.9
msrc
3 месяца назад

connection reuse ignores TLS requirement

CVSS3: 5.9
debian
3 месяца назад

A vulnerability exists where a connection requiring TLS incorrectly re ...

CVSS3: 5.9
github
3 месяца назад

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.

EPSS

Процентиль: 25%
0.00329
Низкий

5.3 Medium

CVSS3