EUVD-2026-46403
GHSA-83mc-f7wh-6hxj
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Object-level authorization, IDOR prevention
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Alert meAnalysisAIv1 – Jul 21, 2026
Unauthorized information disclosure and case-attachment tampering in Elastic Kibana lets a low-privileged authenticated user with limited file-management permissions read, alter, or delete case attachments belonging to feature areas they should not reach, including sensitive Security Solution cases. The flaw stems from Kibana's file-access authorization check and its resource retrieval using two different resolution mechanisms, allowing the authorization gate to be bypassed. No public exploit identified at time of analysis; not listed in CISA KEV, and EPSS was not provided.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Primary rating from Vendor (elastic) · only source for this CVE.
CVSS VectorVendor: elastic
DescriptionCVE.org
Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized information disclosure and case attachment integrity compromise via Privilege Abuse (CAPEC-122). An inconsistency in Kibana's file access authorization logic allows a low-privileged authenticated user to retrieve, modify, and delete case attachments that belong to feature areas they are not authorized to access. Because the access control check and the resource retrieval use different resolution mechanisms, an authenticated attacker with limited file management permissions can obtain the contents of, modify, or delete protected case attachments - such as those associated with Security Solution cases - without holding the privileges required to access those features.
Executive ViewAI
Elastic Kibana contains an authorization bypass vulnerability enabling authenticated users with limited permissions to access, modify, and delete sensitive Security Solution case attachments. This directly compromises the integrity of security investigations and regulatory evidence for organizations using Kibana's case management capabilities.
Within 24 hours, audit your Kibana deployments to identify affected instances and immediately restrict case attachment access to essential personnel only. Within 7 days, contact Elastic Support for interim mitigation guidance and implement comprehensive audit logging on all case attachment operations to detect unauthorized modifications. Establish a 30-day timeline to deploy official remediation once Elastic releases guidance, and conduct a full security audit of case attachments accessed or modified during the exposure period.
No vendor-released patch identified at time of analysis. Interim mitigations include: (1) restricting case management feature access to authorized users only, reducing the attack surface from low-privilege accounts; (2) implementing network-level access controls to limit Kibana exposure to trusted network ranges; (3) enabling detailed audit logging for case attachment operations and establishing daily review procedures for unauthorized changes; (4) segregating sensitive Security Solution cases to isolated Kibana instances with stricter access controls. Monitor Elastic's security advisories for official patch availability.
Threat Intelligence Overview
NVD
CVE.org
EPSS
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
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
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