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HIGH

CVE-2026-55552

CVSS v3

7.5

HIGH

EPSS Score

1.7 %

exploit probability, as of 2026-10-06

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

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 an

Technical details

Published
2026-08-28
Last Modified
2026-08-28

Frequently asked questions

What is CVE-2026-55552?

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 an

Is CVE-2026-55552 actively exploited?

Active exploitation of CVE-2026-55552 has not been confirmed. Its EPSS score was 1.7% on 2026-10-06, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-55552?

CVE-2026-55552 has a CVSS v3 base score of 7.5 (HIGH severity).

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