CVE-2026-34789

HIGHPre-NVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, src/App/PropertyPythonObject.cpp in PropertyPythonObject::Restore() passes the attacker-controlled module attribute from serialized PropertyPythonObject XML directly to PyImport_ImportModule() while restoring a crafted FCStd document, which executes module-level Python code, and the legacy pickle branch also imports an attacker-controlled module and invokes its class constructor through PyObject_CallObject(). This issue is fixed in version 1.1.2.

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
48(Track*)
EG Risk 48/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity70% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github_release Patch Available

FreeCAD 1.1.2

Patch available: FreeCAD/FreeCAD 1.1.2

https://github.com/FreeCAD/FreeCAD/releases/tag/1.1.2
github_commit

commit e2dc6c817267 (FreeCAD/FreeCAD)

Fix landed in FreeCAD/FreeCAD commit e2dc6c817267 — awaiting tagged release

https://github.com/FreeCAD/FreeCAD/commit/e2dc6c8172673642c6856b8b3a5a6accefb18279
github_commit

commit 983037f3003d (FreeCAD/FreeCAD)

Fix landed in FreeCAD/FreeCAD commit 983037f3003d — awaiting tagged release

https://github.com/FreeCAD/FreeCAD/commit/983037f3003dc31f48db36705b86fb3fbe026295
github_commit

commit 81b73925ce22 (FreeCAD/FreeCAD)

Fix landed in FreeCAD/FreeCAD commit 81b73925ce22 — awaiting tagged release

https://github.com/FreeCAD/FreeCAD/commit/81b73925ce22610542367301d8eff4259eb9596e
github Patch Available🟡 PoC Available

Arbitrary code execution via unsandboxed PyImport_ImportModule in PropertyPythonObject::Restore · Advisory · FreeCAD/FreeCAD · GitHub

https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 05:23 UTCEG score recompute
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-28 02:32 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-27 01:30 UTCEG score recompute
  7. 2026-08-26 14:46 UTCEPSS rescore
  8. 2026-08-26 00:29 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 23:27 UTCEG score recompute
  11. 2026-08-24 10:56 UTCEG score recompute
  12. 2026-08-23 09:54 UTCEG score recompute
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-22 08:52 UTCEG score recompute
  15. 2026-08-21 23:49 UTCEPSS rescore
  16. 2026-08-21 07:50 UTCEG score recompute
  17. 2026-08-20 22:55 UTCEPSS rescore
  18. 2026-08-19 18:16 UTCEG score recompute
  19. 2026-08-19 17:03 UTCEPSS rescore
  20. 2026-08-19 04:21 UTCEG score recompute
  21. 2026-08-19 04:12 UTCEG score recompute
  22. 2026-08-18 19:25 UTCEG score recompute
  23. 2026-08-18 19:06 UTCEG score recompute
  24. 2026-08-18 13:48 UTCEPSS rescore
  25. 2026-08-17 21:30 UTCEG score recompute
Show 2 more
  1. 2026-08-17 20:55 UTCEG score recompute
  2. 2026-08-17 20:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-34789?
CVE-2026-34789 is a high vulnerability published on August 17, 2026. FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, src/App/PropertyPythonObject.cpp in PropertyPythonObject::Restore() passes the attacker-controlled module attribute from serialized PropertyPythonObject XML directly to PyImportImportModule() while restoring a…
When was CVE-2026-34789 disclosed?
CVE-2026-34789 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34789 actively exploited?
CVE-2026-34789 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.7% of all scored CVEs.
What is the CVSS score of CVE-2026-34789?
CVE-2026-34789 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2026-34789?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34789, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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