GHSA-m678-f26j-3hrp is a high-severity (CVSS 8.8) CWE-250 vulnerability in jupyter-core. A fix is available for jupyter-core — see the affected versions and patch details below.
Execution with Unnecessary Privileges in JupyterApp
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-m678-f26j-3hrp.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-m678-f26j-3hrp plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
jupyter-coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
Impact
What kind of vulnerability is it? Who is impacted?
We’d like to disclose an arbitrary code execution vulnerability in jupyter_core that stems from jupyter_core executing untrusted files in the current working directory. This vulnerability allows one user to run code as another.
Patches
Has the problem been patched? What versions should users upgrade to?
Users should upgrade to jupyter_core>=4.11.2.
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading? No
References
Are there any links users can visit to find out more? Similar advisory in IPython
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | jupyter-core | all versions | 4.11.2pip install --upgrade 'jupyter-core==4.11.2' |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for jupyter-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update jupyter-core to 4.11.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m678-f26j-3hrp is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-m678-f26j-3hrp can be triaged on real exposure rather than presence alone.
Tailored to GHSA-m678-f26j-3hrp. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Frequently Asked Questions
Is GHSA-m678-f26j-3hrp in your dependencies?
O3 Security finds GHSA-m678-f26j-3hrp across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.