# CVE-2026-107822: MariaDB ACL cache privilege escalation via role collision

Source: https://junglewise.ai/threats/cve-2026-107822-mariadb-server-is-a-community-developed-fork-of-mysql-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-09. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-107822 · Severity: medium · CVSS 6.4 · Published 2026-10-09

MariaDB is a database server that manages user access controls and permissions. A flaw in its privilege caching system could allow an attacker with user creation rights to create a role with a name matching an existing user, causing the system to confuse the two accounts. This could enable the attacker to gain elevated database permissions assigned to the legitimate user.

Technologies: [Mariadb](https://junglewise.ai/threats/technologies/mariadb), [MariaDB Server](https://junglewise.ai/threats/technologies/mariadb-mariadb-server). Vendors: [Mariadb](https://junglewise.ai/threats/vendors/mariadb).

## Quick answers

**Is CVE-2026-107822 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-107822 being exploited in the wild.

**How severe is CVE-2026-107822?** Medium severity, with a CVSS score of 6.4, published 9 October 2026.

**Which products and versions are affected?** MariaDB Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.0 to 11.4.12, 11.5 to 11.8.8, 12.0 to 12.3.2, 13.0.0 to 13.0.1.

**Is there a fix for CVE-2026-107822?** Yes: fixed in MariaDB Server 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-107822 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-107822?** Check whether you run Mariadb or MariaDB Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in MariaDB Server 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2

## Technical details

The ACL cache in MariaDB generates identical cache keys for roles and localhost users when both have empty IP address components, allowing cache collision and privilege confusion. An attacker with CREATE USER capability can create a colliding role principal that, when the original user's database privileges are cached, permits the attacker to exercise the original account's privileges. A fix has been released in the patched versions.

## Affected products

- MariaDB MariaDB Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.0 to 11.4.12, 11.5 to 11.8.8, 12.0 to 12.3.2, 13.0.0 to 13.0.1

## Timeline

- 2026-10-09: disclosed

## References

- [https://github.com/MariaDB/server/commit/67ea07dd3400004e4f7ae01bf977f4344bbe064b](https://github.com/MariaDB/server/commit/67ea07dd3400004e4f7ae01bf977f4344bbe064b)
- [https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19](https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19)

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