MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
CVE-2026-92262 · published 16 Oct 2026
How serious is it
- Severity: critical, CVSS score 9.9 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-92262?
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Who is affected
- MariaDB server: >= 10.6.1, < 10.6.28, >= 10.11.1, < 10.11.19, >= 11.4.1, < 11.4.13, >= 11.8.1, < 11.8.9
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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, the #mysql50# bypass prefix is affected because it allows the #mysql50# prefix to bypass normal table-name filesystem encoding. An attacker can trigger the issue with a table name using the #mysql50# prefix, then use a #mysql50# table name to access files under their legacy unencoded name and cause crashes, data corruption, data exfiltration, or remote code execution. 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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- github.com/MariaDB/server/security/advisories/GHSA-65jj-h265-3m7h
- github.com/MariaDB/server/commit/574ba66b2d6c5d71db83d416677876e9b592858e
- github.com/MariaDB/server/commit/f277eefa424850a8cba5c2371406047f6395e8bb
- github.com/MariaDB/server/releases/tag/mariadb-10.11.19
- github.com/MariaDB/server/releases/tag/mariadb-10.6.28
- github.com/MariaDB/server/releases/tag/mariadb-11.4.13
- github.com/MariaDB/server/releases/tag/mariadb-11.8.9
- github.com/MariaDB/server/releases/tag/mariadb-12.3.3
- github.com/MariaDB/server/releases/tag/mariadb-13.0.2
- jira.mariadb.org/browse/MDEV-40362
Merged from CVE List. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON