Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-5222

low Nessus Plugin ID 316872

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.

 - Cargo between 1.68 and 1.96 incorrectly normalized the URLs of third-party registries using the sparse index protocol. If a hosting provider allowed multiple registries to be hosted with arbitrary names within the same domain, an attacker able to publish crates in a registry could obtain the credentials of others users of the same registry. The severity of the vulnerability is **low**, due to the extremely niche requirements needed to achieve the attack. (CVE-2026-5222)

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://ubuntu.com/security/CVE-2026-5222

Plugin Details

Severity: Low

ID: 316872

File Name: unpatched_CVE_2026_5222.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 5/27/2026

Updated: 5/27/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-5222

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6

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

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

CVSS v4

Risk Factor: Low

Base Score: 2.3

Threat Score: 0.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:rustc-1.89, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:rustc-1.84, p-cpe:/a:canonical:ubuntu_linux:cargo, p-cpe:/a:canonical:ubuntu_linux:rustc-1.62, p-cpe:/a:canonical:ubuntu_linux:rustc-1.85, p-cpe:/a:canonical:ubuntu_linux:rustc-1.76, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:rustc-1.91, p-cpe:/a:canonical:ubuntu_linux:rustc-1.88, p-cpe:/a:canonical:ubuntu_linux:rustc-1.79, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:rustc-1.80, p-cpe:/a:canonical:ubuntu_linux:rustc-1.92, p-cpe:/a:canonical:ubuntu_linux:rustc-1.93, p-cpe:/a:canonical:ubuntu_linux:rustc-1.82, p-cpe:/a:canonical:ubuntu_linux:rustc-1.74, p-cpe:/a:canonical:ubuntu_linux:rustc-1.78, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:rustc-1.77, p-cpe:/a:canonical:ubuntu_linux:rustc-1.83, p-cpe:/a:canonical:ubuntu_linux:rustc-1.81, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:rustc

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/25/2026

Reference Information

CVE: CVE-2026-5222