{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44246 exists.","fix":"No fix has been published for CVE-2026-44246 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-44246 is a high-severity code injection vulnerability in MIC-DKFZ nnUNet, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-44246 and fix it if it is affected.\n\nWhat it is: CVE-2026-44246 is a high-severity code injection vulnerability in MIC-DKFZ nnUNet, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44246 exists.\n\nAffected product: MIC-DKFZ nnUNet. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-44246/ (Markdown: https://insights.sbomify.com/CVE-2026-44246/index.md)","id":"CVE-2026-44246","markdown":"https://insights.sbomify.com/CVE-2026-44246/index.md","name":"CVE-2026-44246","record":{"aliases":["GHSA-63mx-j37w-gh59"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"GitHub Actions workflow","requires_auth":"none","summary":"Attackers can inject malicious prompts into GitHub Actions workflows via issue content, leading to unauthorized code execution and privilege escalation.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nnu-net","vendor":"dkfz"}],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"},{"id":"CWE-1427","name":"Improper Neutralization of Input Used for LLM Prompting"}],"description":"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 title and body content are embedded directly into the prompt of anthropics/claude-code-action, and the workflow then runs a command-capable Claude agent with permission to comment on and relabel the current issue via gh. Because this workflow is triggered automatically on issues.opened, an external attacker can submit a crafted issue that steers the agent beyond its intended issue-triage purpose and influences authenticated issue actions. This vulnerability is fixed in 2.4.1.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-09-06","github_poc":2,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-06T23:48:30Z","kind":"github_poc","ref":"https://github.com/pvharmo2/gha-lab-733c168b88","stars":0,"title":"Authorized security-research lab reproducing CVE-2026-44246 (GHSA-63mx-j37w-gh59): prompt injection via verbatim issue title/body inlining into the claude-code-action triage agent in nnU-Net's issue-triage workflow. Snapshot of MIC-DKFZ/nnUNet @ 9a1db0dd1c74894fa17e79014be4097f546a51be."},{"date":"2026-09-16T21:24:52Z","kind":"github_poc","ref":"https://github.com/sushant-me/agentic-workflow-injection","stars":0,"title":"Reproducible vulnerable/fixed fixtures for agentic workflow injection in GitHub Actions (CVE-2026-44246), plus measured detector coverage"}],"tier":"weaponised"},"has_fix":false,"headline":"nnU-Net: Agentic workflow injection in `.github/workflows/issue-triage.yml` of `MIC-DKFZ/nnUNet`","id":"CVE-2026-44246","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Volcano: Webhook server vulnerable to OOM due to unbounded HTTP request body size","id":"CVE-2026-44247"},"packages":[],"prev":{"headline":"Kyverno: [policy-reporter-ui] XSS via Stored Property Values in PropertyCard Component","id":"CVE-2026-44245"},"products":["nnUNet"],"published":"2026-05-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-13","vendors":["MIC-DKFZ"]},"summary":"Attackers can inject malicious prompts into GitHub Actions workflows via issue content, leading to unauthorized code execution and privilege escalation.","url":"https://insights.sbomify.com/CVE-2026-44246/"}