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Linux Distros Unpatched Vulnerability : CVE-2026-70367

medium Nessus Plugin ID 331947

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.

 - A Server-Side Request Forgery (SSRF) bypass vulnerability exists in stunnel 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses (e.g., ::ffff:127.0.0.1) or unspecified addresses (0.0.0.0, ::), enabling access to loopback-only services on the stunnel host that should not be network-reachable.
 (CVE-2026-70367)

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-2026-70367

https://security-tracker.debian.org/tracker/CVE-2026-70367

Plugin Details

Severity: Medium

ID: 331947

File Name: unpatched_CVE_2026_70367.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 8/4/2026

Updated: 8/4/2026

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

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-70367

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 5

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:stunnel, p-cpe:/a:debian:debian_linux:stunnel, p-cpe:/a:redhat:enterprise_linux:stunnel

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 8/4/2026

Reference Information

CVE: CVE-2026-70367