---
id: CVE-2026-95521
title: A command injection flaw was found in rpm
summary: >-
  A command injection flaw was found in rpm. Installing or rebuilding a source
  RPM whose source or spec file basenames contain a %() macro construct causes
  rpm to execute an attacker-controlled shell command via popen() while
  relocating th…
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
vendor: Red Hat
product: rpm
affected:
  - rpm (all versions)
  - rpm
  - rpm (all versions)
  - rpm (all versions)
  - rpm (all versions)
  - rpm (all versions)
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:00:46.893'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-95521'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-95521'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2537812'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-95521.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-95521'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-95521'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-24T15:01:31.439999Z'
ingestedAt: '2026-09-24T13:43:25.674Z'
epss: 0.00581
epssPercentile: 0.45449
---

## Overview

A command injection flaw was found in rpm. Installing or rebuilding a source RPM whose source or spec file basenames contain a %() macro construct causes rpm to execute an attacker-controlled shell command via popen() while relocating the source file list. This allows arbitrary command execution as the invoking (typically non-root) user, simply by installing, rebuilding, or otherwise processing an untrusted .src.rpm.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-95521.json)