High 8.8Published Aug 19, 2026

CVE-2026-76647Leantime JSON-RPC API contains a missing authorization vulnerability

Updated under an hour ago (2026-10-19 10:20 UTC)

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Every CVE for Leantime JSON-RPC API

Exploited in the last 30 days

Leantime JSON-RPC API through version 3.9.0 contains a missing authorization vulnerability in the JSON-RPC dispatcher in app/Domain/Api/Controllers/Jsonrpc.php. The dispatcher does not enforce authorization before invoking service-layer methods, allowing an authenticated user to call methods or act on resources outside their intended permissions. For example, the editOwn method accepts a user-supplied user ID without verifying that it belongs to the caller, allowing an attacker to modify another user's account and set a new password, resulting in account takeover. This vulnerability is distinct from CVE-2026-59712 and CVE-2026-15509 because the root cause is the lack of centralized authorization enforcement in the JSON-RPC dispatcher rather than the behavior of an individual exposed method.

CVSS: 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-862, CWE-200, CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: certcc
NVD analysis: Deferred
Record last updated: Aug 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Leantime JSON-RPC API leantime:json_rpc_api (from the name)	through 3.8.0	CNA record

References

https://vokecyber.com/research/leantime-jsonrpc-editown-account-takeover
https://vokecyber.com/blog/leantime-jsonrpc-editown-account-takeover
https://leantime.io/unlocking-leantimes-power-a-guide-to-the-json-rpc-api/

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.