Description
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.
Published: 2026-09-24
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

To mitigate this issue, Red Hat recommends avoiding the installing or rebuilding of source RPMs from untrusted or unverified sources.

Tracking

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Advisories

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History

Mon, 28 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat hardened Images
Rpm
Rpm rpm
Vendors & Products Redhat hardened Images
Rpm
Rpm rpm

Fri, 25 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 25 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 24 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Rpm: rpm: shell command injection via macro expansion of source/spec file basenames when installing a source rpm
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Weaknesses CWE-78
CPEs cpe:/a:redhat:hummingbird:1
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Subscriptions

Redhat Enterprise Linux Hardened Images Hummingbird
Rpm Rpm
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-24T15:02:40.089Z

Reserved: 2026-09-22T08:44:44.967Z

Link: CVE-2026-95521

cve-icon Vulnrichment

Updated: 2026-09-24T15:01:41.978Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-24T14:18:20.290

Modified: 2026-09-24T21:00:46.893

Link: CVE-2026-95521

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-24T12:35:33Z

Links: CVE-2026-95521 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-28T19:43:16Z

Weaknesses
  • CWE-78

    Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')