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Linux Distros Unpatched Vulnerability : CVE-2026-3783

medium Nessus Plugin ID 301851

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a redirect to a second URL, curl could leak that token to the second hostname under some circumstances. If the hostname that the first request is redirected to has information in the used .netrc file, with either of the `machine` or `default` keywords, curl would pass on the bearer token set for the first host also to the second one. (CVE-2026-3783)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-3783

https://security-tracker.debian.org/tracker/CVE-2026-3783

Plugin Details

Severity: Medium

ID: 301851

File Name: unpatched_CVE_2026_3783.nasl

Version: 1.8

Type: Local

Agent: unix

Family: Misc.

Published: 3/11/2026

Updated: 7/13/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.9

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

CVSS Score Source: CVE-2026-3783

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:centos:centos:7, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:curl, p-cpe:/a:centos:centos:libcurl, p-cpe:/a:centos:centos:libcurl-devel, p-cpe:/a:debian:debian_linux:curl, p-cpe:/a:redhat:enterprise_linux:curl, p-cpe:/a:redhat:enterprise_linux:s390utils, p-cpe:/a:redhat:enterprise_linux:libcurl, p-cpe:/a:redhat:enterprise_linux:libcurl-devel, p-cpe:/a:redhat:enterprise_linux:libcurl-minimal, p-cpe:/a:redhat:enterprise_linux:s390utils-base, p-cpe:/a:redhat:enterprise_linux:s390utils-cmsfs-fuse, p-cpe:/a:redhat:enterprise_linux:s390utils-cpacfstatsd, p-cpe:/a:redhat:enterprise_linux:s390utils-cpuplugd, p-cpe:/a:redhat:enterprise_linux:s390utils-devel, p-cpe:/a:redhat:enterprise_linux:s390utils-hmcdrvfs, p-cpe:/a:redhat:enterprise_linux:s390utils-iucvterm, p-cpe:/a:redhat:enterprise_linux:s390utils-mon_statd, p-cpe:/a:redhat:enterprise_linux:s390utils-osasnmpd, p-cpe:/a:redhat:enterprise_linux:s390utils-zdsfs, p-cpe:/a:redhat:enterprise_linux:s390utils-ziomon, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:libcurl-minimal, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:curl-minimal, p-cpe:/a:centos:centos:curl-minimal, p-cpe:/a:redhat:enterprise_linux:trustee-guest-components, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:centos:centos:trustee-guest-components, p-cpe:/a:centos:centos:s390utils, p-cpe:/a:centos:centos:s390utils-base, p-cpe:/a:centos:centos:s390utils-chreipl-fcp-mpath, p-cpe:/a:centos:centos:s390utils-cmsfs-fuse, p-cpe:/a:centos:centos:s390utils-core, p-cpe:/a:centos:centos:s390utils-cpacfstatsd, p-cpe:/a:centos:centos:s390utils-cpuplugd, p-cpe:/a:centos:centos:s390utils-devel, p-cpe:/a:centos:centos:s390utils-hmcdrvfs, p-cpe:/a:centos:centos:s390utils-iucvterm, p-cpe:/a:centos:centos:s390utils-mon_statd, p-cpe:/a:centos:centos:s390utils-osasnmpd, p-cpe:/a:centos:centos:s390utils-se-data, p-cpe:/a:centos:centos:s390utils-zdsfs, p-cpe:/a:centos:centos:s390utils-ziomon, p-cpe:/a:centos:centos:snphost, p-cpe:/a:redhat:enterprise_linux:s390utils-chreipl-fcp-mpath, p-cpe:/a:redhat:enterprise_linux:s390utils-core, p-cpe:/a:redhat:enterprise_linux:s390utils-se-data, p-cpe:/a:redhat:enterprise_linux:snphost

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 3/11/2026

Reference Information

CVE: CVE-2026-3783