CVE-2026-78367 Rpm: rpmbuild gettarspec() crafted tar member name → macro injection

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...