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).

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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).
    (CVE-2026-78367)

The version of rpm installed on the remote host is prior to 4.11.3-48. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3984 advisory.

    A flaw was found in rpmbuild. When rpmbuild processes a crafted tarball in tarball mode, a specially     designed tar member name can lead to macro injection. This vulnerability allows a remote attacker to     execute arbitrary code on the system by convincing a user to build a malicious tarball. (CVE-2026-78367)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of rpm installed on the remote host is prior to 4.14.3-4. It is, therefore, affected by a vulnerability as referenced in the ALAS2MOCK2-2026-002 advisory.

    A flaw was found in rpmbuild. When rpmbuild processes a crafted tarball in tarball mode, a specially     designed tar member name can lead to macro injection. This vulnerability allows a remote attacker to     execute arbitrary code on the system by convincing a user to build a malicious tarball. (CVE-2026-78367)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3125 advisory.

    A flaw was found in rpmbuild. When rpmbuild processes a crafted tarball in tarball mode, a specially     designed tar member name can lead to macro injection. This vulnerability allows a remote attacker to     execute arbitrary code on the system by convincing a user to build a malicious tarball. (CVE-2026-78367)

    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. (CVE-2026-84233)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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).
    (CVE-2026-78367)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
474848	Echo: rpm: security update to 4.20.1+dfsg-3+e2	Tenable Cloud Security	Echo Local Security Checks	Local	high
474848	Echo: rpm: security update to 4.20.1+dfsg-3+e2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
365247	Amazon Linux 2 : rpm (ALAS-2026-3984)	Nessus	Amazon Linux Local Security Checks	Local	high
365219	Amazon Linux 2 : rpm (ALASMOCK2-2026-002)	Nessus	Amazon Linux Local Security Checks	Local	high
351017	Amazon Linux 2023 : python3-rpm, rpm, rpm-apidocs (ALAS2023-2026-3125)	Nessus	Amazon Linux Local Security Checks	Local	high
339157	Linux Distros Unpatched Vulnerability : CVE-2026-78367	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-78367

high

Tenable Plugins

high

high

high

high

high

high