Vulnerability details
CVE-2026-85746
MariaDB server
MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
CVSS 3.1
9.9Critical
Official description
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 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.9Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| MariaDB | server | >= 10.11.1, < 10.11.19 | CVEProject cvelistV5 (CNA) |
| MariaDB | server | >= 10.6.1, < 10.6.28 | CVEProject cvelistV5 (CNA) |
| MariaDB | server | >= 11.4.1, < 11.4.13 | CVEProject cvelistV5 (CNA) |
| MariaDB | server | >= 11.8.1, < 11.8.9 | CVEProject cvelistV5 (CNA) |
| MariaDB | server | >= 12.3.1, < 12.3.3 | CVEProject cvelistV5 (CNA) |
| MariaDB | server | >= 13.0.1, < 13.0.2 | CVEProject cvelistV5 (CNA) |
References and advisories
9- https://github.com/MariaDB/server/security/advisories/GHSA-8fvj-c57c-pggx x_refsource_CONFIRM
- https://github.com/MariaDB/server/commit/5c04ca5524385356ff7cf84974a7d491974c1f85 x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19 x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28 x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13 x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9 x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 x_refsource_MISC
- https://jira.mariadb.org/browse/MDEV-40329 x_refsource_MISC
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Details
- Published
- 2026-10-16
- Last updated
- 2026-10-16
- State
- Published
- Assigner (CNA)
- GitHub_M
- Kolun priority
- 40 · Medium
Exploit prediction (EPSS)
0.97%
Probability of exploitation in 30 days
62%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-787Out-of-bounds Write