CVE-2026-49261 — mariadb
CRITICALCVE-2026-49261 is a critical-severity (CVSS 10) OS Command Injection vulnerability in mariadb. A fix is available for mariadb — see the affected versions and patch details below.
MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-49261.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-49261 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
mariadbReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Bitnami packages — download data is not available via public APIs for these ecosystems.
Description
MariaDB server is a community developed fork of MySQL server. Versions 10.6.1 through 10.6.26, 10.11.1 through 10.11.17, 11.4.1 through 11.4.11, 11.8.1 through 11.8.7, and 12.3.1 with wsrep_notify_cmd enabled would execute shell commands embedded in the name of the joiner node. This is fixed in 10.6.27, 10.11.18, 11.4.12, 11.8.8, and 12.3.2. As a workaround, anyone who cannot upgrade now should disable wsrep_notify_cmd.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦Bitnami | mariadb | ≥ 10.6.1&&< 10.6.27 | 10.6.27 |
Affected Products
mariadbmariadbDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mariadb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update mariadb to 10.6.27 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-49261 is resolved across your whole dependency graph.
Workarounds
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Red Hat has assessed this vulnerability as Important. Exploitation requires the `wsrep_notify_cmd` server variable to be explicitly set to a notification script by the administrator. This variable is empty by default in the upstream configuration, and Red Hat's shipped Galera configuration additionally defaults to…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 10 | mariadb10.11-3:10.11.18-1.el10_2 | RHSA-2026:33093 |
| Red Hat Enterprise Linux 10 | mariadb11.8-3:11.8.8-1.el10_2 | RHSA-2026:33412 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | mariadb10.11-3:10.11.18-1.el10_0 | RHSA-2026:49522 |
| Red Hat Enterprise Linux 8 | mariadb:10.11-8100020260616102001.489197e6 | RHSA-2026:33464 |
| Red Hat Enterprise Linux 9 | mariadb:11.8-9080020260612104015.rhel9 | RHSA-2026:33481 |
| Red Hat Enterprise Linux 9 | mariadb:10.11-9080020260612103452.rhel9 | RHSA-2026:33482 |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | mariadb:10.11-9040020260804103423.rhel9 | RHSA-2026:52848 |
| Red Hat Enterprise Linux 9.6 Extended Update Support | mariadb:10.11-9060020260804103117.rhel9 | RHSA-2026:54142 |
Frequently Asked Questions
Is CVE-2026-49261 in your dependencies?
Find it across Bitnami, including transitive dependencies.