Detections
Analytics
SCA: security update for github.com/fleetdm/fleet (GHSA-63m5-974w-448v)
critical Tenable Self-Hosted Container Security Plugin ID 436836
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Fleet is open source device management software. In versions prior to 4.78.3, 4.77.1, 4.76.2, 4.75.2, and
4.53.3, a vulnerability in Fleet's Windows MDM enrollment flow could allow an attacker to submit forged
authentication tokens that are not properly validated. Because JWT signatures were not verified, Fleet
could accept attacker-controlled identity claims, enabling enrollment of unauthorized devices under
arbitrary Azure AD user identities. Versions 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3 fix the issue. If
an immediate upgrade is not possible, affected Fleet users should temporarily disable Windows MDM.
(CVE-2026-23518)
Solution
Update the github.com/fleetdm/fleet library and its related packages to version 4.43.5-0.20260112202845-e225ef57912c or later.See Also
Plugin Details
Severity: Critical
ID: 436836
Version: Revision 1.13
Type: Local
Family: SCA Checks
Published: 1/21/2026
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 57.88
Vendor
Vendor Severity: Critical
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-23518
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Critical
Base Score: 9.3
Threat Score: 8.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 1/20/2026
Vulnerability Publication Date: 1/20/2026
Reference Information
CVE: CVE-2026-23518
cwe: CWE-347