CVE-2024-39903 is a high-severity (CVSS 8.6) Path Traversal vulnerability in solara. A fix is available for solara — see the affected versions and patch details below.
Local File Inclusion in Solara
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- 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 CVE-2024-39903.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
solaraReal-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
Solara is a pure Python, React-style framework for scaling Jupyter and web apps. A Local File Inclusion (LFI) vulnerability was identified in widgetti/solara, in version <1.35.1, which was fixed in version 1.35.1. This vulnerability arises from the application's failure to properly validate URI fragments for directory traversal sequences such as '../' when serving static files. An attacker can exploit this flaw by manipulating the fragment part of the URI to read arbitrary files on the local file system.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | solara | all versions | 1.35.1pip install --upgrade 'solara==1.35.1' |
Affected Products
solarawidgettiDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for solara, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update solara to 1.35.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-39903 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.
How to detect CVE-2024-39903
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2024-39903 -u https://target- Template
- Solara <1.35.1 - Local File Inclusion
- Severity
- high
- Impact
- Unauthenticated attackers can exploit LFI to read arbitrary files from the local filesystem.
- Remediation
- Update Solara to version 1.35.1 or later.
Template by ProjectDiscovery nuclei-templates (iamnoooob, rootxharsh, pdresearch), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2024-39903 in your dependencies?
Find it across PyPI, including transitive dependencies.