---
cve: "CVE-2026-66412"
severity: "HIGH"
cvss: 7.1
epss: "24%"
vendor: "Leantime"
kev: false
exploited: false
published: "2026-07-27 07:16:30"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T17:33:24+02:00"
---

# CVE-2026-66412

> 7.1 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 68898eeb914882a21797523f2782914795bc67ae (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-66412) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_