---
id: CVE-2026-84838
title: A flaw was found in rpmuncompress
summary: >-
  A flaw was found in rpmuncompress. This command injection vulnerability allows
  a local attacker to execute arbitrary commands. This occurs when rpmuncompress
  processes a specially crafted archive filename containing shell
  metacharacters,…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
published: '2026-09-02'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T03:17:37.330'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84838'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:82378'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-84838'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2462222'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.01
epssPercentile: 0.61856
ingestedAt: '2026-10-14T04:12:54.295Z'
---

## Overview

A flaw was found in rpmuncompress. This command injection vulnerability allows a local attacker to execute arbitrary commands. This occurs when rpmuncompress processes a specially crafted archive filename containing shell metacharacters, which are not properly escaped before being passed to shell command strings. Successful exploitation requires user interaction, where a user or automated workflow invokes rpmuncompress on the malicious file, leading to high impact on the confidentiality, integrity, and availability of data accessible to the invoking user.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.