CVE-2026-555527.5HighCWE-22

CVE-2026-55552: Yamcs: Unauthenticated Directory Traversal

yamcs

Affected: yamcs · Exploitation: check available, not yet exploited

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.7%probability of exploitation in the next 30 days

77th percentile

050100

Higher than 77% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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 products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

yamcs · yamcs< 5.12.0

On the Atlas

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Open the Atlas

Exploitation: Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
CISA KEV: Not listed
Public check: Yamcs <=5.11.12 - Arbitrary File Read · nuclei template in projectdiscovery/nuclei-templates
Weakness: Path Traversal · File and Path Handling
Vendor: yamcs
Published: August 2026
Band: Check available, not yet exploited, August 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-55552 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.