CVE-2026-103870

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publishes a distribution tree. Addon and variant ids from .treeinfo are used as directory names. A user who can sync or upload that tree can make the publish task create a new directory outside the task work area and write that tree's repository metadata and packages there, as the Pulp worker user. An existing file or directory is not replaced. The flaw does not disclose data and does not stop the service."}], "id": "CVE-2026-103870", "lastModified": "2026-11-13T02:18:49.240", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-103870", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-07T19:27:57.474141Z", "version": "2.0.3"}}]}, "published": "2026-10-07T06:16:35.373", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99949"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99950"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99952"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-103870"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544606"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Daoqing Yu for reporting this issue.", "bugzilla": {"description": "pulp-rpm: Distribution tree publish creates directories from .treeinfo ids", "id": "2544606", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544606"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-22", "details": ["A flaw was found in pulp-rpm when it publishes a distribution tree. Addon and variant ids from .treeinfo are used as directory names. A user who can sync or upload that tree can make the publish task create a new directory outside the task work area and write that tree's repository metadata and packages there, as the Pulp worker user. An existing file or directory is not replaced. The flaw does not disclose data and does not stop the service."], "mitigation": {"lang": "en:us", "value": "Syncing distribution trees only from a trusted upstream avoids a crafted .treeinfo from that source. An account that can upload a tree directly can still supply the file.\nOtherwise, Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability. Customers are advised to apply the relevant security updates when they become available."}, "name": "CVE-2026-103870", "package_state": [{"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "python3.12-pulp-rpm", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "python-pulp-rpm", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:rhui:4::el8", "fix_state": "Not affected", "package_name": "python-pulp-rpm", "product_name": "Red Hat Update Infrastructure 4 for Cloud Providers"}, {"cpe": "cpe:/a:redhat:rhui:4::el8", "fix_state": "Not affected", "package_name": "python-pulp-rpm-client", "product_name": "Red Hat Update Infrastructure 4 for Cloud Providers"}, {"cpe": "cpe:/a:redhat:rhui:5::el9", "fix_state": "Not affected", "package_name": "python-pulp-rpm-client", "product_name": "Red Hat Update Infrastructure 5"}, {"cpe": "cpe:/a:redhat:rhui:5::el9", "fix_state": "Not affected", "package_name": "rhui5/rhua-rhel9", "product_name": "Red Hat Update Infrastructure 5"}, {"cpe": "cpe:/a:redhat:rhui:5::el9", "fix_state": "Not affected", "package_name": "rhui5/rhua-tp-rhel9", "product_name": "Red Hat Update Infrastructure 5"}], "public_date": "2026-10-07T05:34:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-103870\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-103870"], "statement": "This flaw is rated as Moderate by Red Hat Product Security. This vulnerability affects pulp-rpm's publication of kickstart distribution trees.\nThe caller needs an account that can put a distribution tree into a repository, which is rpm.sync_rpmrepository or the permission to upload RPM content. No extra setting is required. Publishing a repository version that contains a distribution tree is the normal kickstart path.\nThe write is limited because creation fails when the path already exists, and because parent directories are not created. The result is a new directory the worker user is allowed to create, not replacement of existing files.\n```\nThis behavior was added with kickstart publishing in pulp-rpm 3.0.0b5 \n```\n```\nDefault Red Hat repository sync uses mirror mode and does not run this directory creation. Custom upload syncs RPM files only, with no .treeinfo. Pulp is on a separate node, only the RHUI admin can reach it, and sync is from the Red Hat CDN almost all of the time. An end user cannot supply a distribution tree. Hence, it is not affected because Vulnerable Code cannot be Controlled by Adversary.\nAdditionally, RHUI's RPM API client packages does not publish distribution trees. Hence, they are not affected.\nNote: Ansible Automation Platform does not ship pulp-rpm.\n```", "threat_severity": "Moderate"}

{"created": "2026-10-07T07:45:14.222208+00:00", "updated": "2026-10-07T07:45:14.222213+00:00", "vendors": []}