CVE-2026-44246: nnU-Net is a semantic segmentation framework that automatically adapts its pipeline to a dataset

Q: How do I fix CVE-2026-44246?

nnu-net: upgrade to 2.4.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-44246 being exploited?

CVE-2026-44246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-44246 affect?

CVE-2026-44246 affects nnu-net. Severity is high (CVSS 7.2). nnU-Net is a semantic segmentation framework that automatically adapts its pipeline to a dataset. Prior to 2.4.1, the nnU-Net Issue Triage workflow in .github/workflows/issue-triage.yml is vulnerable to Agentic Workflow Injection. The workf

Q: How urgent is CVE-2026-44246?

Priority 41/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.2REMOTEUPGRADE

CVE-2026-44246 is a high-severity flaw (CVSS 7.2) affecting nnu-net. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

nnU-Net is a semantic segmentation framework that automatically adapts its pipeline to a dataset. Prior to 2.4.1, the nnU-Net Issue Triage workflow in .github/workflows/issue-triage.yml is vulnerable to Agentic Workflow Injection. The workflow sets allowed_non_write_users: ${{ github.event.issue.user.login }}, which means any logged-in GitHub user who opens an issue can reach this agentic workflow with attacker-controlled content. Untrusted issue

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-74
Published	2026-05-12
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: dkfz

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-12 21:16 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

dkfz nnu-net UPGRADE

Affected: < 2.4.1

Fixed in: 2.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nnu-net || rpm -q nnu-net || nnu-net --version

2. UPGRADE to 2.4.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nnu-net

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nnu-net

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44246?

nnu-net: upgrade to 2.4.1. Exact commands for each OS are on this page.

Is CVE-2026-44246 being exploited?

CVE-2026-44246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44246 affect?

CVE-2026-44246 affects nnu-net. Severity is high (CVSS 7.2). nnU-Net is a semantic segmentation framework that automatically adapts its pipeline to a dataset. Prior to 2.4.1, the nnU-Net Issue Triage workflow in .github/workflows/issue-triage.yml is vulnerable to Agentic Workflow Injection. The workf

How urgent is CVE-2026-44246?

Priority 41/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

References

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