EUVD-2026-12620Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | Service disruption affecting availability. In critical infrastructure, DoS can have cascading effects on dependent systems. With a CVSS score of 5.3 (MEDIUM), this represents a moderate risk. |
| Exploit ScenarioDerived | An attacker sends specially crafted requests that cause excessive resource consumption (CPU, memory, disk) or trigger a crash in the target application. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 17, 2026
Denial of service in Wazuh 4.3.0 through 4.14.2 allows unauthenticated attackers to exhaust API resources by sending crafted Bearer token requests that trigger blocking disk I/O operations in the authentication middleware, preventing the single-threaded event loop from processing legitimate connections. The vulnerability exists because synchronous file operations are called on every API request without proper resource constraints, enabling attackers to starve the application of CPU availability with relatively low request volumes. No patch is currently available.
Earlier versions of this analysis (1)
RemediationAI
Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users. This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400).
Know when Wazuh gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.3.0 and prior to version 4.14.3, a Denial of Service (DoS) vulnerability exists in the Wazuh API authentication middleware (middlewares.py). The application uses an asynchronous event loop (Starlette/Asyncio) to call a synchronous function (generate_keypair) that performs blocking disk I/O on every request containing a Bearer token. An unauthenticated remote attacker can exploit this by flooding the API with requests containing invalid Bearer tokens. This forces the single-threaded event loop to pause for file read operations repeatedly, starving the application of CPU resources and potentially preventing it from accepting or processing legitimate connections. Version 4.14.3 fixes the issue.
Executive ViewAI
Organizations using version 4.3.0 and should be aware of moderate risk from CVE-2026-25771, a resource exhaustion vulnerability rated CVSS 5.3. Service availability could be impacted. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: implement rate limiting and resource quotas.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Related Vulnerabilities in Wazuh Platform Remote Code Execution
View all 3Wazuh SIEM platform versions 4.4.0 through 4.9.0 contain an unsafe deserialization vulnerability in the DistributedAPI t
In the wazuh-slack active response script in Wazuh 4.2.x before 4.2.5, untrusted user agents are passed to a curl comman
Path-traversal-driven root code execution affects the Wazuh security platform's cluster synchronization layer in version
Arbitrary file read in Wazuh cluster deployments (4.0.0 through 4.14.5, and 5.0.0-beta1/beta2) lets a peer node that alr
Arbitrary file write leading to root remote code execution affects Wazuh worker nodes in clustered deployments running v
Wazuh Agent before 4.13.0 on Windows can be made by an authenticated, high-privileged configuration writer to open attac
Remote code execution on the Wazuh cluster master node is achievable by any attacker who controls a cluster worker node,
Path traversal in Wazuh's ip-customblock active response script allows low-privileged remote attackers to create or dele
The agent in OSSEC through 3.1.0 on Windows allows local users to gain NT AUTHORITY\SYSTEM access via Directory Traversa
Cluster key disclosure in Wazuh Manager versions 4.0.0 through 4.14.4 enables a two-stage privilege escalation: a low-pr
Unauthenticated remote denial of service in the Wazuh cluster daemon (wazuh-clusterd) allows a network peer to exhaust p
Exploit-DB