CVE-2026-102523

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{"affected": [{"affectedData": [{"product": "server", "vendor": "MariaDB", "versions": [{"status": "affected", "version": ">= 10.11.1, < 10.11.19"}, {"status": "affected", "version": ">= 11.4.1, < 11.4.13"}, {"status": "affected", "version": ">= 11.8.1, < 11.8.9"}, {"status": "affected", "version": ">= 12.3.1, < 12.3.3"}, {"status": "affected", "version": ">= 13.0.1, < 13.0.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "MariaDB server is a community developed fork of MySQL server. From 10.11.1 until 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ALTER TABLE ... CONVERT ... PARTITION does not apply filename encoding to user-specified partition names before using them in filesystem path construction. An authenticated database user can use a partition name requiring filename escaping to make the conversion operate on table files the user is not authorized to access, allowing unauthorized table reads or modifications. This issue is fixed in versions 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2."}], "id": "CVE-2026-102523", "lastModified": "2026-11-06T21:29:48.800", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-102523", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T20:41:38.446723Z", "version": "2.0.3"}}]}, "published": "2026-11-05T16:17:23.727", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/MariaDB/server/commit/98437c30ae52ed709f266e5f8095d779261a5879"}, {"source": "security-advisories@github.com", "url": "https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19"}, {"source": "security-advisories@github.com", "url": "https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13"}, {"source": "security-advisories@github.com", "url": "https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/MariaDB/server/security/advisories/GHSA-h4vr-wpff-jfx4"}, {"source": "security-advisories@github.com", "url": "https://jira.mariadb.org/browse/MDEV-40413"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-73"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "mariadb: MariaDB: Unauthorized table access via unencoded partition names", "id": "2567501", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567501"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-73", "details": ["A flaw was found in MariaDB. When converting table partitions, the database server does not properly encode user-specified partition names before using them in filesystem path construction. An authenticated database user can exploit this issue by providing a specially crafted partition name to target table files they do not have permission to access. This can allow an attacker to read or modify unauthorized database tables."], "mitigation": {"lang": "en:us", "value": "Limit network access to the MariaDB service to trusted client hosts or localhost, and ensure non-administrative database accounts do not possess table alteration privileges.\n1. Restrict network reachability:\nTo restrict MariaDB network access to trusted management subnets using firewalld:\n# firewall-cmd --permanent --zone=trusted --add-source=<trusted_ip_or_subnet>\n# firewall-cmd --permanent --remove-service=mysql\n# firewall-cmd --reload\nAlternatively, configure the service to bind only to the local loopback interface by adding or editing the following directive in `/etc/my.cnf.d/mariadb-server.cnf` under the `[mysqld]` section:\nbind-address = 127.0.0.1\nApply the configuration by restarting the service:\n# systemctl restart mariadb\n2. Restrict user privileges:\nRevoke the ALTER privilege from untrusted database accounts directly within MariaDB:\nREVOKE ALTER ON <database_name>.* FROM '<user>'@'<host>';\nFLUSH PRIVILEGES;\nCaveats:\nRestricting network access blocks remote connections from disallowed hosts. Binding to localhost prevents all remote connections. Revoking ALTER privileges prevents affected users from altering table schemas or partition configurations, which can impact applications that perform dynamic schema changes.\nWarning:\nRestarting the MariaDB service via systemctl will drop active database connections and cause temporary service unavailability."}, "name": "CVE-2026-102523", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Under investigation", "package_name": "mariadb10.11", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Under investigation", "package_name": "mariadb11.8", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-11-05T15:31:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102523\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102523\nhttps://github.com/MariaDB/server/commit/98437c30ae52ed709f266e5f8095d779261a5879\nhttps://github.com/MariaDB/server/releases/tag/mariadb-10.11.19\nhttps://github.com/MariaDB/server/releases/tag/mariadb-11.4.13\nhttps://github.com/MariaDB/server/releases/tag/mariadb-11.8.9\nhttps://github.com/MariaDB/server/releases/tag/mariadb-12.3.3\nhttps://github.com/MariaDB/server/releases/tag/mariadb-13.0.2\nhttps://github.com/MariaDB/server/security/advisories/GHSA-h4vr-wpff-jfx4\nhttps://jira.mariadb.org/browse/MDEV-40413"], "statement": "This vulnerability is rated as having Important impact because an authenticated database user with basic table management rights can bypass schema authorization boundaries to read or modify arbitrary database files across the instance. In standard Red Hat Enterprise Linux shared or multi-tenant database environments, this allows unauthorized access to data belonging to other users or databases managed by the same daemon. Although exploitation requires legitimate database credentials, the severity is elevated to Important because it breaks relational isolation guarantees without requiring administrative privileges.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[10.11.1,10.11.19)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[11.4.1,11.4.13)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[11.8.1,11.8.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[12.3.1,12.3.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[13.0.1,13.0.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "server", "source": "cna", "vendor": "MariaDB"}, "product": "server", "vendor": "mariadb"}], "created": "2026-11-05T16:30:12.538244+00:00", "updated": "2026-11-05T16:45:06.031416+00:00", "vendors": ["mariadb", "mariadb$PRODUCT$server"]}