CVE-2026-66412

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Leantime/leantime/commit/68898eeb914882a21797523f2782914795bc67ae
https://github.com/Leantime/leantime/pull/3657
https://github.com/Leantime/leantime/security/advisories/GHSA-wv69-xr82-phr6
https://www.vulncheck.com/advisories/leantime-all-versions-prior-to-and-broken-access-control-via-tickets-getmilestone-json-rpc
https://github.com/Leantime/leantime/pull/3657

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-27 07:16

Updated : 2026-07-28 16:07

NVD link : CVE-2026-66412

Mitre link : CVE-2026-66412

CVE.ORG link : CVE-2026-66412

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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