KNMI adaguc-server up to 7.2.1 Coordinate Parser CConvertGeoJSON.cpp memory corruption

Summaryinfo

A vulnerability categorized as critical has been discovered in KNMI adaguc-server up to 7.2.1. This impacts an unknown function of the file adagucserverEC/CConvertGeoJSON.cpp of the component Coordinate Parser. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2026-50126. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in KNMI adaguc-server up to 7.2.1. It has been declared as critical. This vulnerability affects an unknown functionality of the file adagucserverEC/CConvertGeoJSON.cpp of the component Coordinate Parser. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Adaguc-server is an open source geographical information system to visualize, combine, compare and share real-time meteorological, climatological and remote sensing data via OGC standards. Versions prior to 7.2.2 crash with a memory-safety fault when it parses a GeoJSON document whose geometry contains a malformed coordinate. The coordinate parser in `adagucserverEC/CConvertGeoJSON.cpp` indexes `pt.u.array.values[0]` and `pt.u.array.values[1]` and uses `polygon.u.array.length` as a loop bound without first validating the JSON node type or the coordinate length. A coordinate that is an empty array, a one-element array, a scalar, or `null` leads to an out-of-bounds heap read or a NULL pointer dereference. The same unchecked pattern is present in four geometry branches: `Polygon`, `LineString`, `MultiLineString` and `MultiPolygon`. The vulnerable parser runs whenever the server processes a local GeoJSON file, either a configured GeoJSON dataset or a GeoJSON file exposed through the `AutoResource` feature and requested by an unauthenticated WMS request. A crafted GeoJSON file reliably crashes the backend process that handles that request. Version 7.2.2 patches the vulnerability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-50126 since 06/03/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

Upgrading to version 7.2.2 eliminates this vulnerability.

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Productinfo

Vendor

• KNMI

Name

• adaguc-server

Version

• 7.2.0
• 7.2.1

Website

• Product: https://github.com/KNMI/adaguc-server/

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