CVE-2026-34398Public exploit

Code execution via eval on BIM metadata

Published Aug 17, 2026 · Updated Aug 19, 2026

Code execution in FreeCAD before 1.1.1 allows attackers to execute arbitrary Python code via crafted FCStd metadata in BIM templates. In src/Mod/BIM/bimcommands/BimProjectManager.py, the Load Template flow reads Meta values for wpposition, wpu, wpv, and wpaxis from the FCStd ZIP and passes them directly to eval() instead of safely parsing vector strings. Exploitation requires user interaction to open a malicious template locally, and the injected Python runs with the full privileges of the FreeCAD process.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in FreeCAD before 1.1.1 allows attackers to execute arbitrary Python code via crafted FCStd metadata in BIM templates. In src/Mod/BIM/bimcommands/BimProjectManager.py, the Load Template flow reads Meta values for wpposition, wpu, wpv, and wpaxis from the FCStd ZIP and passes them directly to eval() instead of safely parsing vector strings. Exploitation requires user interaction to open a malicious template locally, and the injected Python runs with the full privileges of the FreeCAD process.

The record

CVE
CVE-2026-34398
Published
Aug 17, 2026
Updated
Aug 19, 2026
Vendor
FreeCAD
Product
FreeCAD
Classifications
CWE-95, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.19, < 1.1.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FreeCAD · FreeCADversion=>= 0.19, < 1.1.1

Published CVSS scores

7.8GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
T1204.002User Execution Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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