XXE in Freecad
CVE-2026-73235
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.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (5.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Freecad — versions < 1.1.2
Weakness classification (CWE)
References
- github.com/FreeCAD/FreeCAD/security/advisories/GHSA-cp6c-87x9-xf49
- github.com/FreeCAD/FreeCAD/pull/31271
- github.com/FreeCAD/FreeCAD/pull/31280
- github.com/FreeCAD/FreeCAD/commit/7d1b8f5806db578db99feb348e55a6b0eaff7c73
- github.com/FreeCAD/FreeCAD/commit/d98eaf1f194400d8a8886fe6780c54f5c68ea2c3
- github.com/FreeCAD/FreeCAD/releases/tag/1.1.2
Frequently asked questions
- What is CVE-2026-73235?
- CVE-2026-73235 is a medium-severity vulnerability in Freecad, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.1/10. Published 2026-08-11.
- How severe is CVE-2026-73235?
- Medium severity. CVSS v3 base score is 6.1 out of 10.