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SCA: security update for github.com/rancher/rancher (GHSA-pvxj-25m6-7vqr)

high Tenable Self-Hosted Container Security Plugin ID 434596

Description

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

 - A Reliance on Untrusted Inputs in a Security Decision vulnerability in Rancher allows users in the cluster
 to act as others users in the cluster by forging the "Impersonate-User" or "Impersonate-Group" headers.
 This issue affects: Rancher versions prior to 2.5.9. Rancher versions prior to 2.4.16. (CVE-2021-31999)

See Also

https://github.com/advisories/GHSA-pvxj-25m6-7vqr

Plugin Details

Severity: High

ID: 434596

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 8/19/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.58

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

CVSS Score Source: CVE-2021-31999

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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: High

Base Score: 8.7

Threat Score: 6.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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: 4/24/2024

Vulnerability Publication Date: 7/15/2021

Reference Information

CVE: CVE-2021-31999

cwe: CWE-807