Description
A flaw was found in rpm. A local attacker could supply a specially crafted `.gem` filename containing RPM macro syntax. When a user or automated workflow invokes `rpmuncompress -x` on this file, the macro expansion occurs during command construction. This allows the attacker to execute arbitrary commands with the privileges of the invoking account, leading to a compromise of confidentiality, integrity, and availability.
Published: 2026-09-01
Score: 7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Workaround

To mitigate this vulnerability, avoid using `rpmuncompress -x` (or a build workflow that invokes it via %{__rpmuncompress}) on `.gem` files from untrusted sources. Before extraction, rename `.gem` files to remove any RPM macro syntax (e.g., `%(...)`) or utilize an alternative extraction tool that does not expand RPM macros in filenames. In automated environments, implement validation to reject or sanitize untrusted archive names prior to processing

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 04 Sep 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Thu, 03 Sep 2026 16:45:00 +0000

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

Wed, 02 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 01 Sep 2026 15:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in rpm. A local attacker could supply a specially crafted `.gem` filename containing RPM macro syntax. When a user or automated workflow invokes `rpmuncompress -x` on this file, the macro expansion occurs during command construction. This allows the attacker to execute arbitrary commands with the privileges of the invoking account, leading to a compromise of confidentiality, integrity, and availability.
Title Rpm: command execution via macro expansion in `rpmuncompress -x` for crafted `.gem` filenames
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, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Subscriptions

Redhat Enterprise Linux Hardened Images Hummingbird
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-04T02:00:03.814Z

Reserved: 2026-09-01T12:20:02.226Z

Link: CVE-2026-84233

cve-icon Vulnrichment

Updated: 2026-09-04T01:59:58.534Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-01T15:17:43.853

Modified: 2026-09-04T02:17:19.897

Link: CVE-2026-84233

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-01T13:28:58Z

Links: CVE-2026-84233 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T16:27:53Z

Weaknesses