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Vulnerability record · CVE-2026-84838 · published 2 September 2026

CVE-2026-84838: OS command injection vulnerability

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.

7.8 CVSS 3.1 High EPSS 1.0% · top 38.7% CWE-78 · OS command injection Awaiting Analysis
7.8CVSS 3.1 base score
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
3 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-84838
https://bugzilla.redhat.com/show_bug.cgi?id=2462222

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Source: NIST National Vulnerability Database (record CVE-2026-84838), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.