CVE-2026-76647: CWE-862 Missing Authorization in Leantime JSON-RPC API
Leantime JSON-RPC API versions through 3.9.0 have a missing authorization vulnerability in the JSON-RPC dispatcher. This flaw allows authenticated users to invoke service-layer methods without proper permission checks, enabling actions outside their intended scope. For example, the editOwn method can be exploited to modify another user's account and reset their password, leading to account takeover. The root cause is the lack of centralized authorization enforcement in the dispatcher, distinct from other related CVEs.
AI Analysis
Technical Summary
CVE-2026-76647 describes a missing authorization vulnerability in the Leantime JSON-RPC API up to version 3.9.0. The JSON-RPC dispatcher in app/Domain/Api/Controllers/Jsonrpc.php does not enforce authorization before calling service-layer methods. This allows authenticated users to perform unauthorized actions, such as modifying other users' accounts via the editOwn method, which fails to verify that the user ID belongs to the caller. This vulnerability differs from CVE-2026-59712 and CVE-2026-15509 because it stems from missing centralized authorization checks rather than flaws in individual methods.
Potential Impact
An authenticated attacker can exploit this vulnerability to perform unauthorized actions on other users' accounts, including resetting passwords and taking over accounts. This compromises user account integrity and can lead to unauthorized access and control within the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the JSON-RPC API to trusted users only and monitor for suspicious activity. Implement additional authorization checks at the application layer if possible.
CVE-2026-76647: CWE-862 Missing Authorization in Leantime JSON-RPC API
Description
Leantime JSON-RPC API versions through 3.9.0 have a missing authorization vulnerability in the JSON-RPC dispatcher. This flaw allows authenticated users to invoke service-layer methods without proper permission checks, enabling actions outside their intended scope. For example, the editOwn method can be exploited to modify another user's account and reset their password, leading to account takeover. The root cause is the lack of centralized authorization enforcement in the dispatcher, distinct from other related CVEs.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-76647 describes a missing authorization vulnerability in the Leantime JSON-RPC API up to version 3.9.0. The JSON-RPC dispatcher in app/Domain/Api/Controllers/Jsonrpc.php does not enforce authorization before calling service-layer methods. This allows authenticated users to perform unauthorized actions, such as modifying other users' accounts via the editOwn method, which fails to verify that the user ID belongs to the caller. This vulnerability differs from CVE-2026-59712 and CVE-2026-15509 because it stems from missing centralized authorization checks rather than flaws in individual methods.
Potential Impact
An authenticated attacker can exploit this vulnerability to perform unauthorized actions on other users' accounts, including resetting passwords and taking over accounts. This compromises user account integrity and can lead to unauthorized access and control within the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the JSON-RPC API to trusted users only and monitor for suspicious activity. Implement additional authorization checks at the application layer if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- certcc
- Date Reserved
- 2026-08-19T15:24:24.418Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a860607acd9273b49871acc
Added to database: 08/19/2026, 19:37:43 UTC
Last enriched: 08/19/2026, 19:55:02 UTC
Last updated: 08/19/2026, 23:43:49 UTC
Views: 7
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