CVE-2026-50126
adaguc-server GeoJSON coordinate parser (CConvertGeoJSON.cpp) vulnerable to out-of-bounds read and NULL pointer dereference
Description
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.
INFO
Published Date :
Aug. 18, 2026, 5:16 p.m.
Last Modified :
Oct. 22, 2026, 10:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Adaguc-server to version 7.2.2 or later.
- Ensure GeoJSON input is validated before processing.
- Review coordinate parsing logic for safety.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-50126.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-50126 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-50126
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-50126 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-50126 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 22, 2026
Action Type Old Value New Value Added Translation Title: adaguc-server de KNMI, Description: Adaguc-server es un sistema de información geográfica de código abierto para visualizar, combinar, comparar y compartir datos meteorológicos, climatológicos y de teledetección en tiempo real a través de estándares OGC. Las versiones anteriores a la 7.2.2 fallan con un fallo de seguridad de memoria cuando analiza un documento GeoJSON cuya geometría contiene una coordenada malformada. El analizador de coordenadas en “adagucserverEC/CConvertGeoJSON.cpp” indexa “pt.u.array.values[0]” y “pt.u.array.values[1]” y usa “polygon.u.array.length” como límite de bucle sin validar primero el tipo de nodo JSON o la longitud de la coordenada. Una coordenada que es un array vacío, un array de un elemento, un escalar o “null” conduce a una lectura de heap fuera de límites o a una desreferencia de puntero NULL. El mismo patrón sin verificar está presente en cuatro ramas de geometría: “Polygon”, “LineString”, “MultiLineString” y “MultiPolygon”. El analizador vulnerable se ejecuta cada vez que el servidor procesa un archivo GeoJSON local, ya sea un conjunto de datos GeoJSON configurado o un archivo GeoJSON expuesto a través de la característica “AutoResource” y solicitado por una petición WMS no autenticada. Un archivo GeoJSON manipulado bloquea de forma fiable el proceso de backend que maneja esa petición. La versión 7.2.2 parchea la vulnerabilidad. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 18, 2026
Action Type Old Value New Value Added Reference https://github.com/KNMI/adaguc-server/security/advisories/GHSA-mwgv-59vv-rp2m Added SSVC {'id': 'CVE-2026-50126', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-18T17:41:23.498848Z'} -
New CVE Received by [email protected]
Aug. 18, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'KNMI', 'product': 'adaguc-server', 'versions': [{'status': 'affected', 'version': '< 7.2.2'}]}] Added Description 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. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-125 Added CWE CWE-476 Added Reference https://github.com/KNMI/adaguc-server/commit/30dffde1a1776b994d60026f41ca620f7cad72e9 Added Reference https://github.com/KNMI/adaguc-server/pull/710 Added Reference https://github.com/KNMI/adaguc-server/releases/tag/7.2.2 Added Reference https://github.com/KNMI/adaguc-server/security/advisories/GHSA-mwgv-59vv-rp2m