Missing Authorization Affecting org.yamcs:yamcs-core package, versions [,5.12.8)[5.13.0,5.13.2)
Threat Intelligence
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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Test your applications- Snyk IDSNYK-JAVA-ORGYAMCS-19428654
- published29 Aug 2026
- disclosed28 Aug 2026
- creditUnknown
Introduced: 28 Aug 2026
NewCVE-2026-55521 (opens in a new tab)How to fix?
Upgrade org.yamcs:yamcs-core to version 5.12.8, 5.13.2 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authorization in the API controllers responsible for handling IndexesApi, Cop1Api, and TimeApi operations. An attacker can extract sensitive telemetry metadata, disrupt satellite communication link protocols, and manipulate the global simulation time by sending crafted API requests as an authenticated user with no assigned privileges.