CVE-2026-81842 in Grafana
Summary
by MITRE • 09/30/2026
An authenticated user with edit permission on one folder can move a library panel into another folder where they only have view permission, through the library elements API or the equivalent App Platform resource. The update path did not check library panel create permission on the destination folder (incorrect authorization). No data from the destination folder is disclosed, and existing content there cannot be changed.
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Analysis
by VulDB Data Team • 09/30/2026
This vulnerability represents a classic case of broken access control within an application's hierarchical resource management system, specifically affecting the movement of dashboard components between folders with differing permission levels. The core technical flaw lies in the authorization logic governing the update operation for library panels. When an authenticated user initiates a request to move a panel from one folder to another via the library elements API or equivalent App Platform resources, the system correctly validates that the user possesses edit permissions on the source location. However, it fails to perform a corresponding permission check against the destination folder. Specifically, the application does not verify whether the requesting user has create privileges in the target directory before allowing the transfer of content into it. This oversight creates an authorization bypass where users can effectively write data to locations they are only permitted to view, violating the principle of least privilege and proper resource isolation.
The operational impact of this vulnerability is primarily related to integrity rather than confidentiality or availability. Since no sensitive data from the destination folder is disclosed during the process, there is no direct risk of information leakage. Furthermore, because existing content in the target folder cannot be modified by this action, the structural integrity and historical records within that folder remain intact. The primary consequence is the unauthorized placement of new elements into restricted areas. This can lead to cluttering of dashboards intended for specific audiences, potential confusion regarding data ownership or context, and a degradation of the administrative control model. In environments where strict separation of duties exists between content creators and consumers, this flaw allows lower-privileged users to inject objects into high-security zones, potentially disrupting workflows or causing visual noise that obscures critical information for authorized viewers.
From a threat modeling perspective, this vulnerability aligns with CWE-862, which describes Missing Authorization, as the application fails to enforce access control rules on specific resources during an operation. It also relates closely to CWE-732, Permission Assignment Errors, because the system incorrectly assigns write capabilities for a resource in a specific context without verifying the requisite permissions for that target location. In terms of adversary behavior, this technique corresponds to ATT&CK tactic TA0001, Initial Access, specifically under techniques involving privilege escalation or lateral movement through misconfigured access controls. While not an immediate path to full system compromise, it allows attackers who have compromised a low-privileged account to expand their footprint within the application by populating restricted areas with malicious or misleading content, which could be leveraged in subsequent social engineering attacks or as part of a broader campaign to disrupt organizational operations.
Mitigation strategies must focus on implementing robust server-side validation for all state-changing operations involving hierarchical resources. The development team should enforce strict authorization checks at the point of action rather than relying solely on client-side restrictions or incomplete permission cascades. Specifically, any API endpoint that modifies resource locations must verify both source and destination permissions before executing the transaction. This includes checking if the user has create rights in the target folder when moving items into it. Additionally, implementing comprehensive audit logging for such cross-folder operations can aid in detecting anomalous behavior patterns post-deployment. Regular security code reviews should prioritize identifying similar gaps where permission checks are applied to input sources but neglected for output destinations or intermediate states within complex workflows.