Vulnerability DatabaseCVE-2026-66412
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CVE-2026-66412
Published:July 27, 2026
Updated:August 04, 2026
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.
Related Resources (6)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66412.json
https://github.com/Leantime/leantime/pull/3657
https://nvd.nist.gov/vuln/detail/CVE-2026-66412
https://www.vulncheck.com/advisories/leantime-all-versions-prior-to-and-broken-access-control-via-tickets-getmilestone-json-rpc
https://github.com/Leantime/leantime/security/advisories/GHSA-wv69-xr82-phr6
https://github.com/Leantime/leantime/commit/68898eeb914882a21797523f2782914795bc67ae
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Authorization Bypass Through User-Controlled Key
CWE-639
EPSS
Base Score:
0.24