CVE-2026-66412 Details
Description
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.
A broken access control vulnerability has been identified in Leantime versions through 3.6.2. This vulnerability allows authenticated users to access milestone data from projects they are not assigned to by sending arbitrary integer milestone IDs to the tickets.getMilestone JSON-RPC endpoint. Exploitation of this vulnerability enables users to enumerate milestone IDs and retrieve project planning information, including milestone titles, descriptions, and timelines, across all projects on the instance, regardless of project membership.
Users can update to Leantime version 3.6.3 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 27, 2026CISA-ADP
Assessed Jul 27, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Leantime/leantime/pull/3657 | CISA-ADP | Issue TrackingVendor |
| https://github.com/Leantime/leantime/commit/68898eeb914882a21797523f2782914795bc67ae | [email protected] | Source CodeVendor |
| https://github.com/Leantime/leantime/pull/3657 | [email protected] | Issue TrackingVendor |
| https://github.com/Leantime/leantime/security/advisories/GHSA-wv69-xr82-phr6 | [email protected] | AdvisoryBroken LinkVendor |
| https://www.vulncheck.com/advisories/leantime-all-versions-prior-to-and-broken-access-control-via-tickets-getmilestone-json-rpc | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Leantime | <= 3.6.2 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 27, 2026 | CVE Modified | CISA-ADP |
| Jul 27, 2026 | New CVE Received | [email protected] |