CVE-2026-48163Network attack vector

Donor command execution via newline-injected SST values

Published Jun 12, 2026 · Updated Jun 12, 2026

OS command injection in MariaDB Server allows remote authenticated users controlling a Galera joiner to execute shell commands on donor nodes. The wsrep_sst_rsync.sh script copies joiner-supplied remote usernames and passwords verbatim into donor-written stunnel.conf and rsync magic files, so embedded newlines add attacker-chosen directives or lines. Exploitation requires Galera replication and an rsync-based SST; it can run commands with the donor service's host privileges.

CVSS severity8.0
High
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in MariaDB Server allows remote authenticated users controlling a Galera joiner to execute shell commands on donor nodes. The wsrep_sst_rsync.sh script copies joiner-supplied remote usernames and passwords verbatim into donor-written stunnel.conf and rsync magic files, so embedded newlines add attacker-chosen directives or lines. Exploitation requires Galera replication and an rsync-based SST; it can run commands with the donor service's host privileges.

The record

CVE
CVE-2026-48163
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
MariaDB
Product
MariaDB Server
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 10.11.1, < 10.11.18
  2. Affected versionversion=>= 10.6.1, < 10.6.27
  3. Affected versionversion=>= 11.4.1, < 11.4.12
  4. Affected versionversion=>= 11.8.1, < 11.8.8
  5. Affected versionversion=>= 12.3.1, < 12.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MariaDB · MariaDB Serverversion=>= 10.11.1, < 10.11.18; version=>= 10.6.1, < 10.6.27; version=>= 11.4.1, < 11.4.12; version=>= 11.8.1, < 11.8.8; version=>= 12.3.1, < 12.3.2

Published CVSS scores

9.1Red HatCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
8.0GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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