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Linux Distros Unpatched Vulnerability : CVE-2026-34986

high Nessus Plugin ID 305116

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.

 - Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards. Prior to 4.1.4 and 3.0.5, decrypting a JSON Web Encryption (JWE) object will panic if the alg field indicates a key wrapping algorithm (one ending in KW, with the exception of A128GCMKW, A192GCMKW, and A256GCMKW) and the encrypted_key field is empty. The panic happens when cipher.KeyUnwrap() in key_wrap.go attempts to allocate a slice with a zero or negative length based on the length of the encrypted_key. This code path is reachable from ParseEncrypted() / ParseEncryptedJSON() / ParseEncryptedCompact() followed by Decrypt() on the resulting object. Note that the parse functions take a list of accepted key algorithms. If the accepted key algorithms do not include any key wrapping algorithms, parsing will fail and the application will be unaffected. This panic is also reachable by calling cipher.KeyUnwrap() directly with any ciphertext parameter less than 16 bytes long, but calling this function directly is less common. Panics can lead to denial of service. This vulnerability is fixed in 4.1.4 and 3.0.5. (CVE-2026-34986)

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-2026-34986

https://security-tracker.debian.org/tracker/CVE-2026-34986

https://ubuntu.com/security/CVE-2026-34986

Plugin Details

Severity: High

ID: 305116

File Name: unpatched_CVE_2026_34986.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 4/7/2026

Updated: 4/8/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-34986

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-dnf-json, p-cpe:/a:centos:centos:osbuild-composer, p-cpe:/a:redhat:enterprise_linux:grafana, p-cpe:/a:centos:centos:image-builder, p-cpe:/a:centos:centos:osbuild-composer-dnf-json, p-cpe:/a:centos:centos:osbuild-composer-worker, p-cpe:/a:centos:centos:ignition-validate, p-cpe:/a:redhat:enterprise_linux:image-builder, p-cpe:/a:centos:centos:skopeo-tests, p-cpe:/a:redhat:enterprise_linux:skopeo, p-cpe:/a:centos:centos:containers-common, p-cpe:/a:redhat:enterprise_linux:ignition-grub, p-cpe:/a:centos:centos:podman-tests, p-cpe:/a:centos:centos:buildah, p-cpe:/a:centos:centos:opentelemetry-collector, p-cpe:/a:centos:centos:ignition-edge, p-cpe:/a:centos:centos:skopeo, p-cpe:/a:redhat:enterprise_linux:ignition-edge, p-cpe:/a:redhat:enterprise_linux:opentelemetry-collector, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:grafana, p-cpe:/a:centos:centos:osbuild-composer-core, p-cpe:/a:canonical:ubuntu_linux:golang-gopkg-square-go-jose.v2, p-cpe:/a:redhat:enterprise_linux:osbuild-composer, cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:redhat:enterprise_linux:containers-common, p-cpe:/a:redhat:enterprise_linux:skopeo-tests, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:golang-github-go-jose-go-jose.v3, p-cpe:/a:redhat:enterprise_linux:podman-gvproxy, p-cpe:/a:redhat:enterprise_linux:podman-manpages, p-cpe:/a:centos:centos:podman, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-worker, p-cpe:/a:redhat:enterprise_linux:buildah-tests, p-cpe:/a:redhat:enterprise_linux:buildah, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:podman-remote, p-cpe:/a:redhat:enterprise_linux:podman, p-cpe:/a:redhat:enterprise_linux:ignition-validate, p-cpe:/a:centos:centos:podman-remote, p-cpe:/a:debian:debian_linux:golang-gopkg-square-go-jose.v2, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:redhat:enterprise_linux:podman-catatonit, p-cpe:/a:centos:centos:ignition, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:podman-manpages, p-cpe:/a:centos:centos:podman-catatonit, p-cpe:/a:debian:debian_linux:golang-github-go-jose-go-jose, p-cpe:/a:redhat:enterprise_linux:podman-plugins, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-core, p-cpe:/a:redhat:enterprise_linux:podman-tests, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:grafana-selinux, p-cpe:/a:debian:debian_linux:golang-github-go-jose-go-jose.v3, p-cpe:/a:debian:debian_linux:golang-gopkg-square-go-jose.v1, p-cpe:/a:centos:centos:ignition-grub, p-cpe:/a:canonical:ubuntu_linux:golang-github-go-jose-go-jose, p-cpe:/a:centos:centos:podman-docker, p-cpe:/a:centos:centos:podman-gvproxy, p-cpe:/a:centos:centos:podman-plugins, p-cpe:/a:redhat:enterprise_linux:ignition, p-cpe:/a:centos:centos:buildah-tests, p-cpe:/a:redhat:enterprise_linux:grafana-selinux, p-cpe:/a:redhat:enterprise_linux:podman-docker, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10

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: 4/3/2026

Reference Information

CVE: CVE-2026-34986