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RHEL 10 : curl (RHSA-2026:80512)

medium Nessus Plugin ID 368069

Synopsis

The remote Red Hat host is missing one or more security updates for curl.

Description

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:80512 advisory.

 The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.

 Security Fix(es):

 * curl: curl: Proxy credential disclosure via redirects to unauthenticated proxies (CVE-2026-6253)

 * curl: libcurl: Authentication bypass due to incorrect HTTP Negotiate connection reuse (CVE-2026-5545)

 * curl: libcurl: Credential leak via reused proxy connection during HTTP redirects (CVE-2026-6429)

 * curl: libcurl: Information disclosure via incorrect Proxy-Authorization header reuse (CVE-2026-7168)

 * libcurl: libcurl: Use-after-free vulnerability leading to Denial of Service (CVE-2026-10536)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL curl package based on the guidance in RHSA-2026:80512.

See Also

https://access.redhat.com/errata/RHSA-2026:80512

https://access.redhat.com/security/updates/classification/#moderate

https://bugzilla.redhat.com/show_bug.cgi?id=2461202

https://bugzilla.redhat.com/show_bug.cgi?id=2461204

https://bugzilla.redhat.com/show_bug.cgi?id=2461205

https://bugzilla.redhat.com/show_bug.cgi?id=2476979

https://bugzilla.redhat.com/show_bug.cgi?id=2496766

http://www.nessus.org/u?876b2624

Plugin Details

Severity: Medium

ID: 368069

File Name: redhat-RHSA-2026-80512.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/20/2026

Updated: 10/20/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.14

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:C/A:N

CVSS Score Source: CVE-2026-5545

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:10.2, p-cpe:/a:redhat:enterprise_linux:curl, p-cpe:/a:redhat:enterprise_linux:libcurl-devel, p-cpe:/a:redhat:enterprise_linux:libcurl-minimal, p-cpe:/a:redhat:enterprise_linux:libcurl

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/12/2026

Vulnerability Publication Date: 4/30/2026

Reference Information

CVE: CVE-2026-10536, CVE-2026-5545, CVE-2026-6253, CVE-2026-6429, CVE-2026-7168

CWE: 201, 488, 825

RHSA: 2026:80512