CVE-2026-66412CWE-639

Leantime all versions prior to and 3.6.2 Broken Access Control via tickets.getMilestone JSON-RPC

High · published July 27, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
34.8
In the wild
Unconfirmed
What it is

Leantime 3.6.2 and prior contains a broken access control vulnerability that allows authenticated users to read milestone data from projects they are not assigned to by supplying arbitrary integer milestone IDs to the tickets.getMilestone JSON-RPC endpoint. Attackers can enumerate integer milestone IDs through the JSON-RPC API to access project planning information, milestone titles, descriptions, and timelines across all projects on the instance regardless of project membership.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00415 · 34.8th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-07-27T05:23Z
EPSS history
Timeline
  • 27 JUL 05:23Z
    Leantime all versions prior to and 3.6.2 Broken Access Control via tickets.getMilestone JSON-RPC
    cvelistv5