{"id":"CVE-2026-85746","title":"MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections","summary":"MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ST_AsText can write beyond an allocated output buffer when converting deeply nested GeometryCollectio…","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"MariaDB","product":"server","affected":["server >= 10.6.1, < 10.6.28","server >= 10.11.1, < 10.11.19","server >= 11.4.1, < 11.4.13","server >= 11.8.1, < 11.8.9","server >= 12.3.1, < 12.3.3","server >= 13.0.1, < 13.0.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T16:49:55.618818Z"},"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:05:31.146Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-85746","references":[{"url":"https://github.com/MariaDB/server/security/advisories/GHSA-8fvj-c57c-pggx","label":"https://github.com/MariaDB/server/security/advisories/GHSA-8fvj-c57c-pggx"},{"url":"https://github.com/MariaDB/server/commit/5c04ca5524385356ff7cf84974a7d491974c1f85","label":"https://github.com/MariaDB/server/commit/5c04ca5524385356ff7cf84974a7d491974c1f85"},{"url":"https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19","label":"https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19"},{"url":"https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28","label":"https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28"},{"url":"https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13","label":"https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13"},{"url":"https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9","label":"https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9"},{"url":"https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3","label":"https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3"},{"url":"https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2","label":"https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2"},{"url":"https://jira.mariadb.org/browse/MDEV-40329","label":"https://jira.mariadb.org/browse/MDEV-40329"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T17:24:46.963Z","slug":"CVE-2026-85746","body":"## Overview\n\nMariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ST_AsText can write beyond an allocated output buffer when converting deeply nested GeometryCollections because recursive WKT serialization does not account for bytes consumed or reserve sufficient space. A low-privileged remote attacker can submit a specially crafted GIS object to corrupt memory and potentially achieve code execution when combined with another vulnerability. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.\n\n## Affected\n\n- `server >= 10.6.1, < 10.6.28`\n- `server >= 10.11.1, < 10.11.19`\n- `server >= 11.4.1, < 11.4.13`\n- `server >= 11.8.1, < 11.8.9`\n- `server >= 12.3.1, < 12.3.3`\n- `server >= 13.0.1, < 13.0.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":54.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}