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EUVD-2026-248903

fkie_cve-2025-53009

MaterialX is an open standard for the exchange of rich material and look-development content across applications and renderers. In versions 1.39.2 and below, when parsing an MTLX file with multiple nested nodegraph implementations, the MaterialX XML parsing logic can potentially crash due to stack exhaustion. 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-wx6g-fm6f-w822 — MaterialX Stack Overflow via Lack of MTLX XML Parsing Recursion Limit

Affected: PyPI: MaterialX

### Summary

When parsing an MTLX file with multiple nested `nodegraph` implementations, the MaterialX XML parsing logic can potentially crash due to stack exhaustion.

### Details

By specification, multiple kinds of elements in MTLX support nesting other elements, such as in the case of `nodegraph` elements. Parsing these subtrees is implemented via recursion, and since there is no max depth imposed on the XML document, this can lead to a stack overflow when the library parses an MTLX file with an excessively high number of nested elements.

### PoC

Please download the `recursion_overflow.mtlx` file from the following link:

https://github.com/ShielderSec/poc/tree/main/CVE-2025-53009

`build/bin/MaterialXView --material recursion_overflow.mtlx`

### Impact An attacker could intentionally crash a target program that uses MaterialX by sending a malicious MTLX file.

PYSEC-2026-1609 — MaterialX Stack Overflow via Lack of MTLX XML Parsing Recursion Limit

Affected: PyPI: materialx