CVE-2026-34398

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 96% 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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: 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. From 0.19 until 1.1.1, src/Mod/BIM/bimcommands/BimProjectManager.py in the BIM Project Manager Load Template flow passes attacker-controlled FCStd Meta property values for wpposition, wpu, wpv, and wpaxis directly to eval(), allowing arbitrary Python code execution when a user loads a malicious BIM project template. This issue is fixed in version 1.1.1.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
4%
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, github_pr, github_commit, github_release.
github_release Patch Available

FreeCAD 1.1.1

Patch available: FreeCAD/FreeCAD 1.1.1

https://github.com/FreeCAD/FreeCAD/releases/tag/1.1.1
github_commit

commit 9ed351cc4700 (FreeCAD/FreeCAD)

Fix landed in FreeCAD/FreeCAD commit 9ed351cc4700 — awaiting tagged release

https://github.com/FreeCAD/FreeCAD/commit/9ed351cc4700db0a94c46f020c34c58bbf1bdaba
github_commit

commit 871ee19b7622 (FreeCAD/FreeCAD)

Fix landed in FreeCAD/FreeCAD commit 871ee19b7622 — awaiting tagged release

https://github.com/FreeCAD/FreeCAD/commit/871ee19b76224910332bbfbd39eebbede967998b
github_pr

BIM: Fix possible code injection attack in FCStd file

Fix merged in FreeCAD/FreeCAD PR #28610 on 2026-03-27 — awaiting tagged release

https://github.com/FreeCAD/FreeCAD/pull/28610
github Patch Available🟡 PoC Available

Arbitrary Code Execution via eval() on untrusted .FCStd metadata in BIM Project Manager · Advisory · FreeCAD/FreeCAD · GitHub

https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-8rfj-7956-6gwf

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 21× 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. 2026-08-25 23:12 UTCEG score recompute
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-24 22:21 UTCEG score recompute
  4. 2026-08-24 09:57 UTCEG score recompute
  5. 2026-08-23 09:07 UTCEG score recompute
  6. 2026-08-23 00:19 UTCEPSS rescore
  7. 2026-08-22 08:18 UTCEG score recompute
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-21 07:29 UTCEG score recompute
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-19 18:16 UTCEG score recompute
  13. 2026-08-19 17:03 UTCEPSS rescore
  14. 2026-08-19 04:20 UTCEG score recompute
  15. 2026-08-19 04:12 UTCEG score recompute
  16. 2026-08-18 16:45 UTCEG score recompute
  17. 2026-08-18 15:45 UTCEG score recompute
  18. 2026-08-18 13:48 UTCEPSS rescore
  19. 2026-08-17 21:30 UTCEG score recompute
  20. 2026-08-17 20:55 UTCEG score recompute
  21. 2026-08-17 20:54 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-34398?
CVE-2026-34398 is a high vulnerability published on August 17, 2026. FreeCAD is a free and open-source multiplatform 3D parametric modeler. From 0.19 until 1.1.1, src/Mod/BIM/bimcommands/BimProjectManager.py in the BIM Project Manager Load Template flow passes attacker-controlled FCStd Meta property values for wpposition, wpu, wpv, and wpaxis directly to eval(),…
When was CVE-2026-34398 disclosed?
CVE-2026-34398 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-2026-34398 actively exploited?
CVE-2026-34398 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 95.5% of all scored CVEs.
What is the CVSS score of CVE-2026-34398?
CVE-2026-34398 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-34398?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34398, 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.

Dependency Blast Radius

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