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SCA: security update for github.com/fleetdm/fleet/v4 (GHSA-j8h8-75h3-jg53)

medium Tenable Self-Hosted Container Security Plugin ID 441841

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Fleet is open source device management software. Prior to version 4.80.1, Fleet trusted client-supplied IP
 address headers when determining the source IP for incoming requests. This allowed authenticated and
 unauthenticated clients to spoof their apparent IP address and bypass per-IP rate limiting controls. Fleet
 determines a client’s public IP address using HTTP headers such as X-Forwarded-For, X-Real-IP, and/or
 True-Client-IP. These headers were trusted without validation. An attacker could supply arbitrary values
 in these headers, causing Fleet to treat each request as originating from a different IP address. This
 could allow an attacker to bypass per-IP rate limits and increase the effectiveness of brute-force or
 password-spraying attempts against authentication endpoints. This issue does not allow authentication
 bypass, privilege escalation, data exposure, or remote code execution on its own. Version 4.80.1 contains
 a patch. As a workaround, run Fleet behind a trusted reverse proxy or load balancer that overwrites client
 IP headers. (CVE-2026-24000)

Solution

Update the github.com/fleetdm/fleet/v4 library and its related packages to version 4.80.1 or later.

See Also

https://github.com/advisories/GHSA-j8h8-75h3-jg53

Plugin Details

Severity: Medium

ID: 441841

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 5/14/2026

Updated: 6/1/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-24000

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/14/2026

Vulnerability Publication Date: 5/14/2026

Reference Information

CVE: CVE-2026-24000

cwe: CWE-290