CVE-2026-84837: Rpm: command injection in `rpmbuild -t*` (`gettarspec`) via unescaped tarball path

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-02 · updated 2026-10-14
Weakness: CWE-78

Description

A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly relevant in automated build or continuous integration (CI) workflows that ingest externally supplied artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the build user, which could lead to information disclosure or disruption of the build environment.

Affected products

Red Hat Enterprise Linux 10: all versions
Red Hat Enterprise Linux 7: all versions
Red Hat Enterprise Linux 8: all versions
Red Hat Enterprise Linux 9: all versions
Red Hat Hardened Images: all versions — fixed in 6.1.0-1.3.hum1

How to fix

Upgrade to a fixed version: Red Hat Hardened Images 6.1.0-1.3.hum1. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-84837 or the next vulnerability affects your stack