CVE-2026-102523 (CVSS 8)

Description

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.

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CVSS v3.1 Score

8.0

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0075

Probability of exploitation

0.55%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-73 CWE-73

References

Other References

https://github.com/MariaDB/server/commit/98437c30ae52ed709f266e5f8095d779261a5879 https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19 https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13 https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9 https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 https://github.com/MariaDB/server/security/advisories/GHSA-h4vr-wpff-jfx4 https://jira.mariadb.org/browse/MDEV-40413

Frequently Asked Questions

What is CVE-2026-102523? +

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. It has a CVSS v3.1 base score of 8.0 (HIGH).

How severe is CVE-2026-102523? +

CVE-2026-102523 has a CVSS v3.1 score of 8.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0075, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-102523? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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