CVE-2026-66412

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductLeantime

PublishedJul 27, 2026

First seenJul 27, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Patches

github.com/Leantime/leantime/commit/68898eeb914882a21797523f2782914795bc67ae

Vendor advisories

github.com/Leantime/leantime/security/advisories/GHSA-wv69-xr82-phr6

Affected products

Product	Affected versions	Fixed in
Leantime Leantime	v ≤ 3.6.2	—

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