CVE-2026-107450 in Stump
Summary
by MITRE • 10/08/2026
In Stump through 0.1.10, the updateSmartList and deleteSmartList GraphQL mutations (crates/graphql/src/mutation/smart_lists.rs) depend only on the shared AccessSmartList permission and resolve the target list at Reader access (lacking a creator check). Any authenticated user with that permission can overwrite, delete, or take over another user's smart list. (updateSmartList sets creatorId to the caller identity, and can set visibility to PRIVATE, locking out the original owner.) NOTE: this is unrelated to the graphql crate on crates.io.
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Analysis
by VulDB Data Team • 10/08/2026
The vulnerability identified in Stump versions through 0.1.10 represents a critical authorization flaw within the GraphQL API layer, specifically affecting the smart list management functionality. The core issue stems from an insufficient verification of ownership or administrative privileges when executing mutations that modify existing resources. In secure application design, operations such as updating or deleting sensitive data structures must validate not only general access permissions but also specific resource-level ownership to prevent unauthorized interference with other users' private configurations.
The technical root cause lies in the implementation of the updateSmartList and deleteSmartList GraphQL mutations located within the smart_lists.rs module. These endpoints rely exclusively on a shared AccessSmartList permission check, which grants broad read or access capabilities but fails to enforce strict ownership constraints during write operations. When these mutations are invoked, the system resolves the target list based solely on this general permission level rather than verifying that the requesting user is the legitimate creator of the smart list. This architectural oversight allows any authenticated user possessing the AccessSmartList privilege to interact with lists they do not own.
The operational impact of this flaw is severe and multifaceted, enabling both data destruction and account takeover scenarios through configuration manipulation. An attacker can delete another user's smart list entirely, resulting in a denial of service for that specific feature set or loss of curated content organization. More critically, the updateSmartList mutation contains logic that sets the creatorId field to the identity of the caller making the request. This behavior effectively transfers ownership of the resource from the original owner to the attacker without proper authorization checks.
Furthermore, the vulnerability allows an attacker to alter the visibility settings of a smart list to PRIVATE after taking over its creation rights. By changing the visibility status, the attacker can lock out the legitimate user, preventing them from viewing or managing their own data structure. This combination of ownership transfer and access restriction constitutes a significant security breach, compromising both the integrity and availability of user-specific configurations within the application.
From an industry standards perspective, this vulnerability aligns with CWE-269, which describes Improper Privilege Management, as it involves bypassing intended restrictions to perform actions beyond authorized levels. It also maps closely to CWE-862, Missing Authorization Check, because the system fails to verify that the user is permitted to access or modify the specific resource instance in question. In terms of offensive security frameworks such as MITRE ATT&CK, this behavior corresponds to techniques involving Privilege Escalation and Account Manipulation, where an adversary leverages flawed logic to gain control over another entity's resources.
To mitigate this vulnerability, developers must implement strict ownership verification within the mutation resolvers. The updateSmartList and deleteSmartList functions should explicitly check that the authenticated user’s identity matches the stored creatorId of the target smart list before allowing any modifications or deletions. Additionally, logic that updates metadata fields like creatorId based on the caller's identity during an update operation is fundamentally flawed for non-administrative actions and should be removed or restricted to administrative contexts only where such transfers are explicitly intended and audited.