CVE-2026-84837

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In automated build pipelines, ensure tarballs are staged into a trusted local directory and their names are normalized or validated to reject shell metacharacters before `rpmbuild` is invoked."}], "timeline": [{"lang": "en", "time": "2026-05-18T03:32:25.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-09-02T13:38:15.227Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "This issue was discovered by Found by AISLE in partnership with Red Hat."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-12T14:38:08.798Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-02T15:46:29.235324Z", "id": "CVE-2026-84837", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T15:46:35.098Z"}}]}}

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Successful exploitation allows for arbitrary command execution with the privileges of the build user, which could lead to information disclosure or disruption of the build environment."}], "id": "CVE-2026-84837", "lastModified": "2026-11-12T15:17:54.020", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84837", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-02T15:46:29.235324Z", "version": "2.0.3"}}]}, "published": "2026-09-02T16:17:33.560", "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-2026-84837"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2478408"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Found by AISLE in partnership with Red Hat.", "bugzilla": {"description": "rpm: Command Injection in `rpmbuild -t*` (`getTarSpec`) via Unescaped Tarball Path", "id": "2478408", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2478408"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-78", "details": ["A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly relevant in automated build or continuous integration (CI) workflows that ingest externally supplied artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the build user, which could lead to information disclosure or disruption of the build environment."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, avoid using `rpmbuild -t*` with tarballs whose paths or filenames can be influenced by untrusted input. In automated build pipelines, ensure tarballs are staged into a trusted local directory and their names are normalized or validated to reject shell metacharacters before `rpmbuild` is invoked."}, "name": "CVE-2026-84837", "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"}], "public_date": "2026-09-02T13:38:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-84837\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-84837"], "statement": "This issue is considered Moderate severity because, although successful exploitation can result in arbitrary command execution with the privileges of the user running rpmbuild, exploitation requires an attacker to influence the path or filename of a tarball that is subsequently processed by rpmbuild in tarball mode (-ta/-tb/-ts). The vulnerable code is not exposed as a network service and cannot be triggered remotely without a local build or CI workflow processing an attacker-controlled tarball name.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 83.0, "confidence_source": "matching", "scores": [{"score": 83.0, "source": "matching"}]}, "original": {"product": "Red Hat Hardened Images", "source": "cna", "vendor": "Red Hat"}, "product": "hardened_images", "vendor": "redhat"}], "created": "2026-09-03T11:30:03.602167+00:00", "updated": "2026-09-03T16:27:13.757206+00:00", "vendors": ["redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$hardened_images"]}