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Vulnerability record · CVE-2026-78367 · published 24 August 2026

CVE-2026-78367: Code injection vulnerability

A vulnerability was found in RPM's rpmbuild tarball processing. When processing a crafted source archive, the getTarSpec() function in tools/rpmbuild.cc passes an attacker-controlled tar archive member name to rpmExpand() as part of a %{basename:...} macro expression. A specially crafted .spec member name can therefore inject RPM macros, including Lua expressions, resulting in arbitrary code execution with the privileges of the user running rpmbuild. This can be exploited when a victim or automated build system processes an attacker-controlled source tarball using rpmbuild tarball mode (such as -ts, -ta, or -tb).

7.0 CVSS 3.1 High EPSS 0.20% · top 91.6% CWE-94 · Code injection Awaiting Analysis
7.0CVSS 3.1 base score
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
4 Sep 2026Last modified by NVD

Description

A vulnerability was found in RPM's rpmbuild tarball processing. When processing a crafted source archive, the getTarSpec() function in tools/rpmbuild.cc passes an attacker-controlled tar archive member name to rpmExpand() as part of a %{basename:...} macro expression. A specially crafted .spec member name can therefore inject RPM macros, including Lua expressions, resulting in arbitrary code execution with the privileges of the user running rpmbuild. This can be exploited when a victim or automated build system processes an attacker-controlled source tarball using rpmbuild tarball mode (such as -ts, -ta, or -tb).

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

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-78367
https://bugzilla.redhat.com/show_bug.cgi?id=2521857
https://github.com/rpm-software-management/rpm/issues/4314
https://github.com/rpm-software-management/rpm/issues/4314

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Source: NIST National Vulnerability Database (record CVE-2026-78367), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.