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CVE-2026-78367

Rpm: rpmbuild gettarspec() crafted tar member name → macro injection

CVSS 3.1 7.0 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 6 Nov 2026 01:42:00 UTC. Read the latest advisory.

cve-program · CVE-2026-78367

Published

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).

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-78367

Published

rpm-main

https://catalog.redhat.com/software/containers/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Hardened Images",
                    "collectionURL": "https://catalog.redhat.com/software/containers/",
                    "packageName": "rpm-main",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "6.1.0-1.3.hum1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:hummingbird:1"
                    ]
                }

rpm

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rpm",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:10"
                    ]
                }

rpm

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 6",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rpm",
                    "defaultStatus": "unknown",
                    "cpes": [
                        "cpe:/o:redhat:rhel_els:6"
                    ]
                }

rpm

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rpm",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/o:redhat:rhel_els:7"
                    ]
                }

rpm

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rpm",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:8"
                    ]
                }

rpm

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rpm",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON