CVE-2026-78367

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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)."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rpm", "defaultStatus": "affected", "versions": [{"version": "0:4.19.1.1-29.el10_3", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:10.3"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rpm", "defaultStatus": "affected", "versions": [{"version": "0:4.16.1.3-43.el9_9", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:enterprise_linux:9::appstream", "cpe:/o:redhat:enterprise_linux:9::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat 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Un nombre de miembro .spec especialmente manipulado puede, por lo tanto, inyectar macros de RPM, incluyendo expresiones Lua, resultando en ejecuci\u00f3n de c\u00f3digo arbitrario con los privilegios del usuario que ejecuta rpmbuild. Esto puede ser explotado cuando una v\u00edctima o un sistema de compilaci\u00f3n automatizado procesa un tarball fuente controlado por el atacante usando el modo tarball de rpmbuild (como -ts, -ta o -tb)."}], "id": "CVE-2026-78367", "lastModified": "2026-11-12T15:17:53.747", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-78367", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-24T15:13:40.183552Z", "version": "2.0.3"}}]}, "published": "2026-08-24T14:17:04.767", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82378"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99593"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99595"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-78367"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521857"}, {"source": "secalert@redhat.com", "url": "https://github.com/rpm-software-management/rpm/issues/4314"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/rpm-software-management/rpm/issues/4314"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Sandipan Roy (Red Hat).", "bugzilla": {"description": "rpm: rpmbuild getTarSpec() crafted tar member name \u2192 macro injection", "id": "2521857", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521857"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-94", "details": ["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)."], "mitigation": {"lang": "en:us", "value": "Do not process untrusted tarballs with rpmbuild -ta/-tb/-ts. Extract and inspect archives first (reject member names containing }, %, or {), or build from a reviewed .spec outside tarball mode. Prefer isolated builders (mock/container) for any untrusted packaging related work."}, "name": "CVE-2026-78367", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-78367\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-78367\nhttps://github.com/rpm-software-management/rpm/issues/4314"], "statement": "This issue is considered Moderate severity because, although successful exploitation can result in arbitrary code execution with the privileges of the rpmbuild process, exploitation requires an attacker to supply a specially crafted source tarball and have it processed by rpmbuild in tarball mode. The vulnerable code is not exposed as a network service and cannot be directly triggered remotely without this archive-processing workflow.", "threat_severity": "Moderate"}

{"created": "2026-08-24T17:45:03.721576+00:00", "updated": "2026-08-24T19:30:17.426866+00:00", "vendors": []}