geopython pygeoapi up to 0.23.2 OGC API path traversal

Summaryinfo

A vulnerability classified as critical has been found in geopython pygeoapi up to 0.23.2. Impacted is an unknown function of the component OGC API. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-42351. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in geopython pygeoapi up to 0.23.2 and classified as critical. Affected by this vulnerability is some unknown processing of the component OGC API. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality. The summary by CVE is:

pygeoapi is a Python server implementation of the OGC API suite of standards. From version 0.23.0 to before version 0.23.3, a raw string path concatenation vulnerability in pygeoapi's STAC FileSystemProvider plugin can allow for requests to STAC collection based collections to expose directories without authentication. The issue manifests when pygeoapi is deployed without a proxy or web front end that would normalize URLs with .. values, along with a resource of type stac-collection defined in configuration. This issue has been patched in version 0.23.3.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-42351 since 04/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 0.23.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch bf25b8695edbdd5476eeffc102b633d1d3e45f52 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Programming Language Software

Vendor

• geopython

Name

• pygeoapi

Version

• 0.23.0
• 0.23.1
• 0.23.2

License

• open-source

Website

• Product: https://github.com/geopython/pygeoapi/

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