id: PYSEC-2026-1609
published: "2026-07-07T16:03:00.026599Z"
modified: "2026-07-07T16:03:00.026599Z"
aliases:
- CVE-2025-53009
- GHSA-wx6g-fm6f-w822
summary: "MaterialX Stack Overflow via Lack of MTLX XML Parsing Recursion Limit "
details: "### Summary\n\nWhen parsing an MTLX file with multiple nested `nodegraph` implementations, the MaterialX XML parsing logic can potentially crash due to stack exhaustion.\n\n### Details\n\nBy 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.\n\n### PoC\n\nPlease download the `recursion_overflow.mtlx` file from the following link: \n\nhttps://github.com/ShielderSec/poc/tree/main/CVE-2025-53009\n\n`build/bin/MaterialXView --material recursion_overflow.mtlx`\n\n\n### Impact\nAn attacker could intentionally crash a target program that uses MaterialX by sending a malicious MTLX file."
affected:
- package:
    name: materialx
    ecosystem: PyPI
    purl: pkg:pypi/materialx
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 1.39.2
    - fixed: 1.39.3
  versions:
  - 1.39.2
references:
- type: WEB
  url: https://github.com/AcademySoftwareFoundation/MaterialX/security/advisories/GHSA-wx6g-fm6f-w822
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2025-53009
- type: WEB
  url: https://github.com/AcademySoftwareFoundation/MaterialX/issues/2504
- type: WEB
  url: https://github.com/AcademySoftwareFoundation/MaterialX/pull/2505
- type: WEB
  url: https://github.com/AcademySoftwareFoundation/MaterialX/commit/91ffea0de7bfe7bcd0c399b07f04fc48227055ff
- type: PACKAGE
  url: https://github.com/AcademySoftwareFoundation/MaterialX
- type: WEB
  url: https://github.com/AcademySoftwareFoundation/MaterialX/releases/tag/v1.39.3
- type: WEB
  url: https://github.com/ShielderSec/poc/tree/main/CVE-2025-53009
- type: PACKAGE
  url: https://pypi.org/project/materialx
- type: ADVISORY
  url: https://github.com/advisories/GHSA-wx6g-fm6f-w822
severity:
- type: CVSS_V4
  score: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P