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Fencer Intel
critical 9.1

CVE-2026-48163 in the critical feed json

MariaDB: wsrep SST unsafe parameter handling on the donor side (rsync)

published 5mo ago modified 14d ago also BIT-mariadb-2026-48163 , BIT-mariadb-min-2026-48163 , BIT-mysql-client-2026-48163 , EUVD-2026-36519 , GHSA-rpgv-q6gv-684r

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami mariadb 10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2
  • bitnami mariadb-min 10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2
  • bitnami mysql-client 10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2
  • Red Hat Red Hat Enterprise Linux 10 3:10.11.18-1.el10_2, 3:11.8.8-1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 3:10.11.18-1.el10_0
  • Red Hat Red Hat Enterprise Linux 8 8100020260616102001.489197e6
  • Red Hat Red Hat Enterprise Linux 9 9080020260612103452.rhel9, 9080020260612104015.rhel9
  • Red Hat Red Hat Hardened Images 10.11.18-1.hum1, 11.8.8-1.hum1
  • mariadb Debian 12 1:10.11.18-0+deb12u1
  • mariadb Debian 14 1:11.8.8-1

debian advisories DEBIAN-CVE-2026-48163

  • mariadb Ubuntu 26.04 LTS 1:11.8.6-5ubuntu0.1

ubuntu advisories UBUNTU-CVE-2026-48163

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • galera RHEL 9 26.4.27-1.module+el9.8.0+24389+c97c30be
  • mariadb RHEL 9 3:11.8.8-1.module+el9.8.0+24389+c97c30be
  • mariadb-pam RHEL 9 3:11.8.8-1.module+el9.8.0+24389+c97c30be
  • mariadb-test RHEL 9 3:11.8.8-1.module+el9.8.0+24389+c97c30be
  • mariadb-backup RHEL 9 3:11.8.8-1.module+el9.8.0+24389+c97c30be
  • mariadb-common RHEL 9 3:11.8.8-1.module+el9.8.0+24389+c97c30be
  • mariadb-errmsg RHEL 9 3:11.8.8-1.module+el9.8.0+24389+c97c30be
  • mariadb-server RHEL 9 3:11.8.8-1.module+el9.8.0+24389+c97c30be

red hat advisories RHSA-2026:49522RHSA-2026:33481RHSA-2026:33482RHSA-2026:33464RHSA-2026:33412RHSA-2026:33093

  • mariadb SLES for SAP applications 16.0, SLES 16.0 11.8.8-160000.1.1
  • mariadb SLE Module for Server Applications 15 SP7, SLE Module for Package Hub 15 SP7 11.8.8-150700.3.15.1

suse advisories SUSE-SU-2026:22095-1SUSE-SU-2026:2330-1

  • mariadb openSUSE Leap 16.0 11.8.8-160000.1.1
  • mariadb openSUSE Tumbleweed 11.8.8-1.1

opensuse advisories openSUSE-SU-2026:20933-1openSUSE-SU-2026:10934-1

  • galera AlmaLinux 10 26.4.27-1.el10_2
  • mariadb11.8 AlmaLinux 10 3:11.8.8-1.el10_2
  • mariadb11.8-pam AlmaLinux 10 3:11.8.8-1.el10_2
  • mariadb11.8-test AlmaLinux 10 3:11.8.8-1.el10_2
  • mariadb11.8-backup AlmaLinux 10 3:11.8.8-1.el10_2
  • mariadb11.8-common AlmaLinux 10 3:11.8.8-1.el10_2
  • mariadb11.8-errmsg AlmaLinux 10 3:11.8.8-1.el10_2
  • mariadb11.8-server AlmaLinux 10 3:11.8.8-1.el10_2

almalinux advisories ALSA-2026:33412ALSA-2026:33464ALSA-2026:33481ALSA-2026:33482ALSA-2026:33093

  • mariadb10.11 Rocky Linux 10 3:10.11.18-1.el10_2
  • galera Rocky Linux 10 26.4.27-1.el10_2
  • galera Rocky Linux 9 26.4.27-1.module+el9.8.0+40229+87be66a2
  • galera Rocky Linux 9 26.4.27-1.module+el9.8.0+40232+a354f53a
  • mariadb Rocky Linux 9 3:11.8.8-1.module+el9.8.0+40229+87be66a2
  • mariadb Rocky Linux 9 3:10.11.18-1.module+el9.8.0+40232+a354f53a

rocky linux advisories RLSA-2026:33093RLSA-2026:33412RLSA-2026:33481RLSA-2026:33482

  • mariadb Alpine 3.20 10.11.18-r0
  • mariadb Alpine 3.23, Alpine 3.22, Alpine 3.21 11.4.12-r0
  • mariadb Alpine 3.24 11.8.8-r0

alpine advisories ALPINE-CVE-2026-48163

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-48163 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-48163 updated cvss 9.1

mariadb: Arbitrary code execution via improper parameter validation during SST

  • Red Hat Enterprise Linux AppStream (v. 8) Judy 1.0.5-18.module+el8.10.0+21221+7bee72c1, galera 26.4.27-1.module+el8.10.0+24403+8b846dba, mariadb 10.11.18-1.module+el8.10.0+24403+8b846dba, mariadb-pam 10.11.18-1.module+el8.10.0+24403+8b846dba, mariadb-test 10.11.18-1.module+el8.10.0+24403+8b846dba, mariadb-backup 10.11.18-1.module+el8.10.0+24403+8b846dba, +8 more
    fixed: vendor fix RHSA-2026:33464
  • Red Hat Enterprise Linux AppStream (v. 9) galera 26.4.27-1.module+el9.8.0+24388+85f1c439, galera 26.4.27-1.module+el9.8.0+24389+c97c30be, mariadb 11.8.8-1.module+el9.8.0+24389+c97c30be, mariadb 10.11.18-1.module+el9.8.0+24388+85f1c439, mariadb-pam 11.8.8-1.module+el9.8.0+24389+c97c30be, mariadb-test 11.8.8-1.module+el9.8.0+24389+c97c30be, +21 more
    fixed: vendor fix RHSA-2026:33482
  • Red Hat Enterprise Linux AppStream (v. 10) mariadb 10.11.18-1.el10_2, mariadb11.8 11.8.8-1.el10_2, mariadb-pam 10.11.18-1.el10_2, mariadb-test 10.11.18-1.el10_2, mariadb10.11 10.11.18-1.el10_2, mariadb11.8-pam 11.8.8-1.el10_2, +21 more
    fixed: vendor fix RHSA-2026:33093
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) mariadb 10.11.18-1.el10_0, mariadb-pam 10.11.18-1.el10_0, mariadb-test 10.11.18-1.el10_0, mariadb10.11 10.11.18-1.el10_0, mariadb-backup 10.11.18-1.el10_0, mariadb-common 10.11.18-1.el10_0, +8 more
    fixed: vendor fix RHSA-2026:49522
  • Red Hat Hardened Images mariadb 11.8.8-1.hum1, mariadb-pam 11.8.8-1.hum1, mariadb11.8 11.8.8-1.hum1, mariadb-test 11.8.8-1.hum1, mariadb-backup 11.8.8-1.hum1, mariadb-common 11.8.8-1.hum1, +31 more
    fixed: vendor fix RHSA-2026:25143
  • Red Hat Enterprise Linux 7 mariadb, mariadb-libs, mariadb-test, mariadb-bench, mariadb-server, mariadb-embedded Red Hat Enterprise Linux 9 mariadb, mariadb-pam, mariadb-test, mariadb-backup, mariadb-common, mariadb-errmsg, +6 more Red Hat Enterprise Linux AppStream (v. 10) galera 26.4.27-1.el10_2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.0 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
OSV 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami mariadb
>=10.6.1, <10.6.27
>=10.11.1, <10.11.18
>=11.4.1, <11.4.12
>=11.8.1, <11.8.8
>=12.3.1, <12.3.2
10.6.27
10.11.18
11.4.12
11.8.8
12.3.2
bitnami mariadb-min
>=10.6.1, <10.6.27
>=10.11.1, <10.11.18
>=11.4.1, <11.4.12
>=11.8.1, <11.8.8
>=12.3.1, <12.3.2
10.6.27
10.11.18
11.4.12
11.8.8
12.3.2
bitnami mysql-client
>=10.6.1, <10.6.27
>=10.11.1, <10.11.18
>=11.4.1, <11.4.12
>=11.8.1, <11.8.8
>=12.3.1, <12.3.2
10.6.27
10.11.18
11.4.12
11.8.8
12.3.2

Affected products

  • MariaDB server
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of MariaDB/server published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.