CVE-2026-59288 in Spring for GraphQL
Summary
by MITRE • 08/27/2026
The GraphiQL page bundled with Spring for GraphQL sends requests to the GraphQL endpoints of the application. An attacker can share a malicious URL so that the victim's browser might leak confidential information to the attacker's website. Spring for GraphQL 2.0.0 - 2.0.4 Spring for GraphQL 1.4.0 - 1.4.6 Spring for GraphQL 1.1.0 - 1.3.9 Spring for GraphQL 1.0.0 - 1.0.7
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Analysis
by VulDB Data Team • 08/27/2026
The vulnerability identified in the GraphiQL interface bundled with specific versions of Spring for GraphQL represents a significant security risk related to cross-site information leakage and potential data exfiltration through malicious URL sharing. The core issue stems from how the GraphiQL development tool, which is often included by default or easily enabled during application development and testing phases, handles requests sent to GraphQL endpoints. While intended as a convenient debugging interface for developers, this component can be exploited if an attacker crafts a specially designed malicious URL that tricks a victim into interacting with it while authenticated against the target Spring for GraphQL application. When such interaction occurs within the context of the vulnerable browser session, sensitive data associated with the user's active session or query results may inadvertently leak to external domains controlled by the attacker.
From a technical perspective, this flaw is rooted in improper access controls and insufficient validation mechanisms inherent in how GraphiQL processes incoming requests without adequate safeguards against cross-origin attacks. The vulnerability allows an adversary to construct URLs that trigger GraphQL queries containing sensitive fields or operations. If the victim accesses these links while logged into their account on the vulnerable Spring for GraphQL instance, the browser may execute the query under the user's authentication context. Consequently, responses containing confidential information such as personal data, internal system details, or proprietary business logic can be intercepted and transmitted to an attacker-controlled server via techniques like beaconing or image loading exploits embedded within malicious payloads. This behavior aligns with CWE-200: Information Exposure through Unintended Data Leakage, where sensitive data is disclosed without explicit authorization due to flawed implementation of security controls in web interfaces.
The operational impact of this vulnerability extends beyond mere information disclosure as it can lead to severe privacy violations and compromise the integrity of applications relying on Spring for GraphQL for API management. Attackers leveraging this flaw could gain unauthorized access to restricted resources, perform actions on behalf of authenticated users, or extract critical configuration details that facilitate further exploitation attempts such as privilege escalation or targeted phishing campaigns. In environments where GraphiQL remains enabled in production settings rather than being strictly confined to development and testing stages, the attack surface expands significantly since any user with valid credentials becomes a potential target for social engineering attacks involving shared malicious links.
Mitigation strategies must prioritize disabling unnecessary features like GraphiQL in non-development environments while enforcing strict authentication checks if such tools remain accessible remotely. Organizations should ensure that all instances of Spring for GraphQL are updated to versions beyond those listed as vulnerable, specifically avoiding releases between 1.0.0 through 2.0.4 and 1.4.0 through 1.4.6 depending on the major version line in use. Additionally implementing robust input validation mechanisms alongside proper CORS policies will help prevent unauthorized cross-origin requests from succeeding even if malicious URLs are attempted by attackers. Regular audits of deployed components coupled with adherence to secure coding practices recommended by industry standards such as OWASP Top Ten guidelines provide essential layers of defense against similar threats targeting modern web frameworks built around GraphQL architectures.