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CVE Record

CVE-2026-49441: Wazuh : peer-controlled metadata key in process_files_from_worker non-merged branch allows arbitrary file write under WAZUH_PATH on Wazuh manager

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.3.0 until 4.14.6 and 5.0.0-beta3, the non-merged branch of process_files_from_worker() in framework/wazuh/core/cluster/master.py trusts a peer-controlled file_path key from files_metadata.json. The destination is joined to WAZUH_PATH without proving that it remains inside the directory selected by cluster_item_key. A cluster peer holding the shared Fernet key can upload a crafted extra-valid archive and overwrite security-sensitive files such as /var/ossec/etc/ossec.conf. Replacing ossec.conf can configure root-executed commands and lead to code execution after a service reload. This issue is fixed in versions 4.14.6 and 5.0.0-beta3.

CriticalCVSS 9.1Not KEV-listedUpdated
Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A trusted Wazuh cluster peer possessing the shared Fernet key can overwrite sensitive manager files. Altering the main configuration may enable commands to run as root after a service reload, potentially compromising the manager and its security operations.

Executive priority

Treat this as an urgent manager upgrade, especially where cluster credentials may be exposed or peer trust is uncertain. Compromise could undermine the security platform itself and enable root-level execution, although the attacker must already possess privileged cluster access.

Technical view

The non-merged processing branch trusts a peer-supplied file_path from files_metadata.json without confirming the destination remains within the cluster item directory. This permits arbitrary file writes under WAZUH_PATH, including ossec.conf. The affected ranges are 4.3.0 through 4.14.5 and 5.0.0-beta1 through beta2.

Likely exposure

Exposure is limited to affected Wazuh managers where an attacker controls a cluster peer and possesses the shared Fernet key. This is not described as an unauthenticated internet attack, but compromised peer credentials or cluster membership could produce manager-level impact.

Exploitation context

The bundle reports no CISA KEV listing, and the cited sources provide no evidence of active exploitation. Exploitation requires privileged cluster access through a peer holding the shared Fernet key. Successful configuration replacement can lead to root-level code execution after reload.

Researcher notes

The issue is CWE-73 path control in process_files_from_worker(). The vulnerable non-merged branch fails to constrain peer-controlled metadata to the directory selected by cluster_item_key. The documented impact is arbitrary overwrite under WAZUH_PATH; evidence does not establish writes outside that root.

Mitigation direction

  • Upgrade stable Wazuh installations to version 4.14.6 or later.
  • Upgrade Wazuh 5.0 beta installations to 5.0.0-beta3 or later.
  • Protect the shared Fernet key and restrict cluster participation to authorized peers.
  • Review the vendor advisory and release guidance before applying changes.

Validation and detection

  • Inventory every Wazuh manager and flag versions within the affected ranges.
  • Confirm all stable managers run 4.14.6 or later.
  • Confirm all 5.0 beta managers run beta3 or later.
  • Review cluster peer membership and shared-key access for unauthorized holders.
  • Inspect ossec.conf and other sensitive WAZUH_PATH files for unexpected changes.
Prepared
Confidence
high
Sources
6

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-73: File access and web shell behavior lookup

File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection 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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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-49441 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
9.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:H/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.

1CVSS vectors
3Timeline events
1ADP providers
6Source links

SSVC decision data

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

CVSS vector scores

1 official score

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
9.1CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H2.36GitHub_M

Vulnerability scoring details

Base CVSS 3.1 score

9.1Critical
CVSS 3.1 vector shape for CVE-2026-49441Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:H/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. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

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

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
wazuhwazuh>= 4.3.0, < 4.14.6, >= 5.0.0-beta1, < 5.0.0-beta3Listed
Weakness

CWE details

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

CWE-73 · source CWE mapping

External Control of File Name or Path

External Control of File Name or Path represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.