CVE-2026-55552: Yamcs is a mission control framework. Prior to 5.11.13, Yamcs StaticFileHandler.locateFile resolves an unauthenticated request path without using…

PriorityP349high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EPSS

0.43%

36.5th percentile

Yamcs is a mission control framework. Prior to 5.11.13, Yamcs StaticFileHandler.locateFile resolves an unauthenticated request path without using Path.normalize and Path.toAbsolutePath to confirm that the absolute path remains within the configured staticRoots. A path containing traversal segments can escape the intended web root and return an arbitrary readable host file. The flaw is in yamcs-core/src/main/java/org/yamcs/http/StaticFileHandler.java and can disclose sensitive operating-system and application data. This issue is fixed in version 5.11.13, and the 5.12 line is fixed from version 5.12.0.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
yamcs	yamcs	< 5.12.0	5.12.0

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