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CVE Record

CVE-2026-49261: MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`

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`.

CriticalCVSS 10Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

Affected MariaDB clusters can run attacker-supplied shell commands when wsrep_notify_cmd is enabled and a malicious joiner node name is processed. Successful exploitation could expose data, alter systems, and disrupt database availability without authentication or user interaction.

Executive priority

Treat exposed affected clusters as an emergency remediation item. Prioritize systems containing sensitive or business-critical data, especially those reachable from untrusted networks. Patch promptly or disable wsrep_notify_cmd, then investigate suspicious historical activity because exploitation could compromise the database host.

Technical view

CVE-2026-49261 is a CWE-78 command-injection flaw in MariaDB Server’s wsrep_notify_cmd parameter handling. A crafted joiner node name can reach shell execution. Affected releases are 10.6.1–10.6.26, 10.11.1–10.11.17, 11.4.1–11.4.11, 11.8.1–11.8.7, and 12.3.1, only when wsrep_notify_cmd is enabled.

Likely exposure

Exposure is limited to affected MariaDB versions with wsrep_notify_cmd enabled. Internet or untrusted-network reachability of the relevant cluster service increases risk. Instances outside the listed versions, or with this option disabled, are not identified as vulnerable by the supplied advisory.

Exploitation context

The CVSS 3.1 score is 10.0, reflecting network-based, low-complexity, unauthenticated exploitation without user interaction and potentially complete impact. The supplied record says this CVE is not in KEV, and no cited evidence confirms active exploitation.

Researcher notes

The vulnerable path depends on wsrep_notify_cmd processing an attacker-controlled joiner node name. The CVSS vector is AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. The supplied sources do not establish observed exploitation, affected configurations beyond those listed, or reliable indicators of compromise.

Mitigation direction

  • Upgrade to 10.6.27, 10.11.18, 11.4.12, 11.8.8, or 12.3.2, as appropriate.
  • Disable wsrep_notify_cmd immediately if upgrading cannot be completed now.
  • Restrict untrusted network access to affected cluster services while remediation is pending.
  • Review MariaDB and operating-system vendor advisories for distribution-specific packages and restart requirements.

Validation and detection

  • Inventory MariaDB versions across all clustered database nodes.
  • Confirm whether wsrep_notify_cmd is configured or enabled on each affected instance.
  • Verify installed packages meet the fixed version for their release branch.
  • After remediation, confirm wsrep_notify_cmd remains disabled unless operationally required.
  • Review database, notification, and host logs for unexpected joiner names or shell activity.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-78: Command execution behavior lookup

Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-49261 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
10 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
16Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
10CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96GitHub_M
9CVSS 3.1CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H2.26redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

10Critical
CVSS 3.1 vector shape for CVE-2026-49261Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPmariadb: MariaDB Server: Arbitrary code execution via wsrep_notify_cmd
other:Red Hat severity ratingcvssV3_1
  • 2026-06-11T18:01:07.126Z: Reported to Red Hat.
  • 2026-06-11T17:13:20.776Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MariaDBserver>= 10.6.1, < 10.6.27, >= 10.11.1, < 10.11.18, >= 11.4.1, < 11.4.12, >= 11.8.1, < 11.8.8, = 12.3.1Listed
Weakness

CWE details

CWE-78

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-78 · source CWE mapping

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs