ctfer-io romeo up to 0.2.1 Tar decoder.go sanitizeArchivePath path traversal

Summaryinfo

A vulnerability was found in ctfer-io romeo up to 0.2.1 and classified as critical. Impacted is the function sanitizeArchivePath of the file webserver/api/v1/decoder.go of the component Tar Handler. The manipulation results in path traversal. This vulnerability is reported as CVE-2026-32805. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in ctfer-io romeo up to 0.2.1. Affected is the function sanitizeArchivePath of the file webserver/api/v1/decoder.go of the component Tar Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity, and availability. CVE summarizes:

Romeo gives the capability to reach high code coverage of Go ≥1.20 apps by helping to measure code coverage for functional and integration tests within GitHub Actions. Prior to version 0.2.2, the `sanitizeArchivePath` function in `webserver/api/v1/decoder.go` (lines 80-88) is vulnerable to a path traversal bypass due to a missing trailing path separator in the `strings.HasPrefix` check. A crafted tar archive can write files outside the intended destination directory. Version 0.2.2 fixes the issue.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-32805 since 03/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 0.2.2 eliminates this vulnerability.

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Productinfo

Vendor

• ctfer-io

Name

• romeo

Version

• 0.2.0
• 0.2.1

Website

• Product: https://github.com/ctfer-io/romeo/

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