CVE-2025-53010 — MaterialX's unchecked nodeGraph->getOutput return is vulnerable to NULL Pointer Dereference

Affected: AcademySoftwareFoundation MaterialX

MaterialX is an open standard for the exchange of rich material and look-development content across applications and renderers. In version 1.39.2, when parsing shader nodes in a MTLX file, the MaterialXCore code accesses a potentially null pointer, which can lead to crashes with maliciously crafted files. An attacker could intentionally crash a target program that uses OpenEXR by sending a malicious MTLX file. This is fixed in version 1.39.3.

GHSA-3jhf-gxhr-q4cx — MaterialX Null Pointer Dereference in getShaderNodes due to Unchecked nodeGraph->getOutput return

Affected: PyPI: MaterialX

### Summary

When parsing shader nodes in a MTLX file, the MaterialXCore code accesses a potentially null pointer, which can lead to crashes with maliciously crafted files.

### Details

In `src/MaterialXCore/Material.cpp`, in function `getShaderNodes`, the following code fetches the output nodes for a given `nodegraph` input node:

```cpp // SNIP... else if (input->hasNodeGraphString()) { // Check upstream nodegraph connected to the input. // If no explicit output name given then scan all outputs on the nodegraph. ElementPtr parent = materialNode->getParent(); NodeGraphPtr nodeGraph = parent->getChildOfType<NodeGraph>(input->getNodeGraphString()); if (!nodeGraph) { continue; } vector<OutputPtr> outputs; if (input->hasOutputString()) { outputs.push_back(nodeGraph->getOutput(input->getOutputString())); // <--- null ptr is returned } else { outputs = nodeGraph->getOutputs(); } for (OutputPtr output : outputs) { NodePtr upstreamNode = output->getConnectedNode(); // <--- CRASHES HERE if (upstreamNode && !shaderNodeSet.count(upstreamNode)) { if (!target.empty() && !upstreamNode->getNodeDef(target)) { continue;…

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CVE-2025-53010 — MaterialX's unchecked nodeGraph->getOutput return is vulnerable to NULL Pointer Dereference

GHSA-3jhf-gxhr-q4cx — MaterialX Null Pointer Dereference in getShaderNodes due to Unchecked nodeGraph->getOutput return