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 a
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-66412
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-664120.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-66412 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Leantime
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-66416: Leantime 3.6.2 contains a cross-site request forgery vulnerability that allows unauthenticated…nvd · 2026-07-30
- highCVE-2026-66415: Leantime 3.6.2 contains a server-side request forgery and local file inclusion vulnerability t…nvd · 2026-07-30
- mediumCVE-2026-66414: Leantime 3.6.2 contains an open redirect vulnerability in the Login controller that allows una…nvd · 2026-07-30
- mediumCVE-2026-15510: A vulnerability was found in Leantime up to 3.8.0. Affected is the function Setting::saveSetti…nvd · 2026-07-12
- mediumCVE-2026-15509: A vulnerability has been found in Leantime up to 3.8.0. This impacts the function editUser/add…nvd · 2026-07-12
- highCVE-2026-59713: Leantime contains an OIDC login CSRF vulnerability in the verifyState() method that unconditio…nvd · 2026-07-06
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