CVE-2026-34399Public exploit

Arbitrary code execution via eval on SVG Scale

Published Aug 17, 2026 · Updated Aug 19, 2026

Code injection in BIM Workbench in FreeCAD before 1.1.1 allows attackers to execute arbitrary Python code via a crafted SVG template. In src/Mod/BIM/bimcommands/BimTDPage.py, TechDraw page creation reads the template's editable Scale text and passes slash-containing attacker input to eval() instead of parsing only a numeric ratio. Exploitation requires user interaction to open a malicious local template when creating a TechDraw page, but no prior FreeCAD privileges are required and code runs with the user's permissions.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in BIM Workbench in FreeCAD before 1.1.1 allows attackers to execute arbitrary Python code via a crafted SVG template. In src/Mod/BIM/bimcommands/BimTDPage.py, TechDraw page creation reads the template's editable Scale text and passes slash-containing attacker input to eval() instead of parsing only a numeric ratio. Exploitation requires user interaction to open a malicious local template when creating a TechDraw page, but no prior FreeCAD privileges are required and code runs with the user's permissions.

The record

CVE
CVE-2026-34399
Published
Aug 17, 2026
Updated
Aug 19, 2026
Vendor
FreeCAD
Product
FreeCAD
Classifications
CWE-95, T1059.006, 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

7.8GitHub Advisory DatabaseCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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')
T1059.006Command and Scripting Interpreter Python
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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