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Linux Distros Unpatched Vulnerability : CVE-2026-103001

medium Nessus Plugin ID 359494

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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.

 - PyJWT is a Python implementation of JSON Web Token standards. From 2.11.0 through 2.13.0, PyJWT's PyJWT._merge_options() method can modify a caller-supplied mutable options mapping when verify_signature is false. If an application reuses that same mapping for a later decode() or decode_complete() call and changes verify_signature to true, the mapping can retain false values for expiration, not-before, issued- at, audience, issuer, subject, and JWT ID checks. A signed token with invalid registered claims can then be accepted without disabling signature verification, but applications that create a fresh options mapping for each call are not affected. (CVE-2026-103001)

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-2026-103001

https://ubuntu.com/security/CVE-2026-103001

Plugin Details

Severity: Medium

ID: 359494

File Name: unpatched_CVE_2026_103001.nasl

Version: 1.8

Type: Local

Agent: unix

Family: Misc.

Published: 10/1/2026

Updated: 10/9/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.44

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-103001

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6.2

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:U/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:pyjwt, p-cpe:/a:centos:centos:fence-agents-aliyun, p-cpe:/a:centos:centos:fence-agents-all, p-cpe:/a:centos:centos:fence-agents-amt-ws, p-cpe:/a:centos:centos:fence-agents-apc-snmp, p-cpe:/a:centos:centos:fence-agents-apc, p-cpe:/a:centos:centos:fence-agents-aws, p-cpe:/a:centos:centos:fence-agents-azure-arm, p-cpe:/a:centos:centos:fence-agents-bladecenter, p-cpe:/a:centos:centos:fence-agents-brocade, p-cpe:/a:centos:centos:fence-agents-cisco-mds, p-cpe:/a:centos:centos:fence-agents-cisco-ucs, p-cpe:/a:centos:centos:fence-agents-common, p-cpe:/a:centos:centos:fence-agents-compute, p-cpe:/a:centos:centos:fence-agents-drac5, p-cpe:/a:centos:centos:fence-agents-eaton-snmp, p-cpe:/a:centos:centos:fence-agents-emerson, p-cpe:/a:centos:centos:fence-agents-eps, p-cpe:/a:centos:centos:fence-agents-gce, p-cpe:/a:centos:centos:fence-agents-heuristics-ping, p-cpe:/a:centos:centos:fence-agents-hpblade, p-cpe:/a:centos:centos:fence-agents-ibm-powervs, p-cpe:/a:centos:centos:fence-agents-ibm-vpc, p-cpe:/a:centos:centos:fence-agents-ibmblade, p-cpe:/a:centos:centos:fence-agents-ifmib, p-cpe:/a:centos:centos:fence-agents-ilo-moonshot, p-cpe:/a:centos:centos:fence-agents-ilo-mp, p-cpe:/a:centos:centos:fence-agents-ilo-ssh, p-cpe:/a:centos:centos:fence-agents-ilo2, p-cpe:/a:centos:centos:fence-agents-intelmodular, p-cpe:/a:centos:centos:fence-agents-ipdu, p-cpe:/a:centos:centos:fence-agents-ipmilan, p-cpe:/a:centos:centos:fence-agents-kdump, p-cpe:/a:centos:centos:fence-agents-kubevirt, p-cpe:/a:centos:centos:fence-agents-lpar, p-cpe:/a:centos:centos:fence-agents-mpath, p-cpe:/a:centos:centos:fence-agents-nutanix-ahv, p-cpe:/a:centos:centos:fence-agents-openstack, p-cpe:/a:centos:centos:fence-agents-redfish, p-cpe:/a:centos:centos:fence-agents-rhevm, p-cpe:/a:centos:centos:fence-agents-rsa, p-cpe:/a:centos:centos:fence-agents-rsb, p-cpe:/a:centos:centos:fence-agents-sbd, p-cpe:/a:centos:centos:fence-agents-scsi, p-cpe:/a:centos:centos:fence-agents-virsh, p-cpe:/a:centos:centos:fence-agents-vmware-rest, p-cpe:/a:centos:centos:fence-agents-vmware-soap, p-cpe:/a:centos:centos:fence-agents-wti, p-cpe:/a:centos:centos:fence-agents-zvm, p-cpe:/a:centos:centos:fence-agents, p-cpe:/a:centos:centos:fence-virt, p-cpe:/a:centos:centos:fence-virtd-cpg, p-cpe:/a:centos:centos:fence-virtd-libvirt, p-cpe:/a:centos:centos:fence-virtd-multicast, p-cpe:/a:centos:centos:fence-virtd-serial, p-cpe:/a:centos:centos:fence-virtd-tcp, p-cpe:/a:centos:centos:fence-virtd, p-cpe:/a:centos:centos:ha-cloud-support, p-cpe:/a:centos:centos:python3-jwt, p-cpe:/a:redhat:enterprise_linux:fence-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:fence-agents-all, p-cpe:/a:redhat:enterprise_linux:fence-agents-amt-ws, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc, p-cpe:/a:redhat:enterprise_linux:fence-agents-aws, p-cpe:/a:redhat:enterprise_linux:fence-agents-azure-arm, p-cpe:/a:redhat:enterprise_linux:fence-agents-bladecenter, p-cpe:/a:redhat:enterprise_linux:fence-agents-brocade, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-mds, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-ucs, p-cpe:/a:redhat:enterprise_linux:fence-agents-common, p-cpe:/a:redhat:enterprise_linux:fence-agents-compute, p-cpe:/a:redhat:enterprise_linux:fence-agents-drac5, p-cpe:/a:redhat:enterprise_linux:fence-agents-eaton-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-emerson, p-cpe:/a:redhat:enterprise_linux:fence-agents-eps, p-cpe:/a:redhat:enterprise_linux:fence-agents-gce, p-cpe:/a:redhat:enterprise_linux:fence-agents-heuristics-ping, p-cpe:/a:redhat:enterprise_linux:fence-agents-hpblade, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-powervs, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-vpc, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibmblade, p-cpe:/a:redhat:enterprise_linux:fence-agents-ifmib, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-moonshot, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-mp, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-ssh, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo2, p-cpe:/a:redhat:enterprise_linux:fence-agents-intelmodular, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipdu, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipmilan, p-cpe:/a:redhat:enterprise_linux:fence-agents-kdump, p-cpe:/a:redhat:enterprise_linux:fence-agents-kubevirt, p-cpe:/a:redhat:enterprise_linux:fence-agents-lpar, p-cpe:/a:redhat:enterprise_linux:fence-agents-mpath, p-cpe:/a:redhat:enterprise_linux:fence-agents-nutanix-ahv, p-cpe:/a:redhat:enterprise_linux:fence-agents-openstack, p-cpe:/a:redhat:enterprise_linux:fence-agents-redfish, p-cpe:/a:redhat:enterprise_linux:fence-agents-rhevm, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsa, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsb, p-cpe:/a:redhat:enterprise_linux:fence-agents-sbd, p-cpe:/a:redhat:enterprise_linux:fence-agents-scsi, p-cpe:/a:redhat:enterprise_linux:fence-agents-virsh, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-rest, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-soap, p-cpe:/a:redhat:enterprise_linux:fence-agents-wti, p-cpe:/a:redhat:enterprise_linux:fence-agents-zvm, p-cpe:/a:redhat:enterprise_linux:fence-agents, p-cpe:/a:redhat:enterprise_linux:fence-virt, p-cpe:/a:redhat:enterprise_linux:fence-virtd-cpg, p-cpe:/a:redhat:enterprise_linux:fence-virtd-libvirt, p-cpe:/a:redhat:enterprise_linux:fence-virtd-multicast, p-cpe:/a:redhat:enterprise_linux:fence-virtd-serial, p-cpe:/a:redhat:enterprise_linux:fence-virtd-tcp, p-cpe:/a:redhat:enterprise_linux:fence-virtd, p-cpe:/a:redhat:enterprise_linux:ha-cloud-support, p-cpe:/a:redhat:enterprise_linux:python3-jwt

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

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 9/30/2026

Reference Information

CVE: CVE-2026-103001