CVE-2026-100844

HIGHNVD 7.88.4▲
EchelonGraph scoreHIGH confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-09-27. NVD baseline CVSS 7.8; sources differ by 0.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this weekElevated
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 7.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

MONAI before 1.6.0 is vulnerable to OS command injection in the nnUNetV2Runner component (monai.apps.nnunet.nnunetv2_runner). User-controlled values taken from the YAML configuration file (notably dataset_name_or_id) and from CLI/kwargs arguments are concatenated into a command string without quoting or validation and then passed to subprocess with shell=True, so shell metacharacters (e.g., ';' on Linux, '&' on Windows) are interpreted. If a victim loads and processes a crafted configuration file — for example by instantiating nnUNetV2Runner with the malicious YAML and invoking a training/validation job such as train_single_model() — arbitrary commands are executed with the privileges of the user running the job.

CVSS v3
7.8
EG Score
8.4HIGHhigh confidence
EG Risk
54
EG Risk 54/100CISA SSVC

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
Severity84% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.8%
EPSS %ILE
53rd
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 27, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Sep 27, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

MONAI before 1.6.0 OS Command Injection via dataset_name_or_id | Advisories | VulnCheck

https://www.vulncheck.com/advisories/monai-before-1.6.0-os-command-injection-via-dataset-name-or-id
github Patch Available🟡 PoC Available

VN: JVN#50379904 Vulnerability found in MONAI · Advisory · Project-MONAI/MONAI · GitHub

https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-rghg-q7wp-9767

Vendor Advisories for CVE-2026-100844(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
monai0.0.1 ... 1.5.2rc1 (43 versions)1.6.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 32× in last 7d / 35× 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. 2026-10-04 09:04 UTCGHSA enrichment
  2. 2026-10-03 20:18 UTCEG score recompute
  3. 2026-10-03 20:18 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 07:31 UTCGHSA enrichment
  6. 2026-10-02 18:43 UTCEG score recompute
  7. 2026-10-02 18:43 UTCGHSA enrichment
  8. 2026-10-02 05:54 UTCEG score recompute
  9. 2026-10-02 05:54 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 17:09 UTCGHSA enrichment
  12. 2026-10-01 04:24 UTCGHSA enrichment
  13. 2026-09-30 15:39 UTCEG score recompute
  14. 2026-09-30 15:39 UTCGHSA enrichment
  15. 2026-09-30 15:37 UTCNVD updateCVSS v3 → 7.8
  16. 2026-09-30 15:02 UTCEPSS rescore
  17. 2026-09-30 12:33 UTCGHSA enrichment
  18. 2026-09-29 23:47 UTCEG score recompute
  19. 2026-09-29 23:47 UTCGHSA enrichment
  20. 2026-09-29 15:20 UTCEPSS rescore
  21. 2026-09-29 10:03 UTCEG score recompute
  22. 2026-09-29 10:02 UTCGHSA enrichment
  23. 2026-09-28 21:13 UTCEG score recompute
  24. 2026-09-28 21:13 UTCGHSA enrichment
  25. 2026-09-28 17:38 UTCEG score recompute
Show 10 more
  1. 2026-09-28 17:38 UTCGHSA enrichment
  2. 2026-09-28 16:57 UTCEG score recompute
  3. 2026-09-28 16:57 UTCGHSA enrichment
  4. 2026-09-28 13:50 UTCEPSS rescore
  5. 2026-09-28 04:08 UTCGHSA enrichment
  6. 2026-09-27 15:22 UTCEG score recompute
  7. 2026-09-27 15:22 UTCGHSA enrichment
  8. 2026-09-27 02:37 UTCEG score recompute
  9. 2026-09-27 01:53 UTCEG score recompute
  10. 2026-09-27 01:49 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-100844?
CVE-2026-100844 is a high vulnerability published on September 27, 2026. MONAI before 1.6.0 is vulnerable to OS command injection in the nnUNetV2Runner component (monai.apps.nnunet.nnunetv2runner). User-controlled values taken from the YAML configuration file (notably datasetnameorid) and from CLI/kwargs arguments are concatenated into a command string without quoting…
When was CVE-2026-100844 disclosed?
CVE-2026-100844 was first published on September 27, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100844 actively exploited?
CVE-2026-100844 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100844?
CVE-2026-100844 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.4 (HIGH).
How do I remediate CVE-2026-100844?
A fix for CVE-2026-100844 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100844 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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