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Vulnerabilities

Vulnerability · CVE-2026-21851

MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging.

Published Jan 7, 2026 · catalog updated Jan 8, 2026 · Project-MONAI MONAI

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-21851. EPSS is 0.36%. Act only if a listed version of Project-MONAI MONAI is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.36%
Remediation
Advisory link
Affected products
vendor Project-MONAI MONAI ≤ 1.5.1

MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging. In versions up to and including 1.5.1, a Path Traversal (Zip Slip) vulnerability exists in MONAI's function. The function uses without path validation, while other similar download functions in the same codebase properly use the existing function. Commit 4014c8475626f20f158921ae0cf98ed259ae4d59 fixes this issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Project-MONAI MONAI ≤ 1.5.1≤ 1.5.1

How to fix CVE-2026-21851

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-21851. EPSS is 0.36%. Act only if a listed version of Project-MONAI MONAI is installed.

Which versions are affected?

Compare what you have installed with Project-MONAI MONAI ≤ 1.5.1 ≤ 1.5.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.36%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 7, 2026 · EUVD

    Detected

    MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging. In versions up to and including 1.5.1, a Path Traversal (Zip Slip) vulnerability exists in MONAI's function. The function uses without path validation, while other similar download functions in the same codebase properly use the existing function. Commit 4014c8475626f20f158921ae0cf98ed259ae4d59 fixes this issue.

  2. Jan 8, 2026 · EUVD

    Updated

    MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging. In versions up to and including 1.5.1, a Path Traversal (Zip Slip) vulnerability exists in MONAI's function. The function uses without path validation, while other similar download functions in the same codebase properly use the existing function. Commit 4014c8475626f20f158921ae0cf98ed259ae4d59 fixes this issue.

Sources

  • CVE.orgVulnerability recordCVE-2026-21851

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-21851

    30-day exploitation probability 0.36%

    first.org
  • EUVDVulnerability recordEUVD-2026-1039

    MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging. In versions up to and including 1.5.1, a Path Traversal (Zip Slip) vulnerability exists in MONAI's function. The function uses without path validation, while other similar download functions in the same

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • CVE.orgOct 31, 2026
  • EUVDOct 30, 2026