CVE-2026-45140 is a critical-severity (CVSS 9.8) Path Traversal vulnerability in chamilo/chamilo-lms. A fix is available for chamilo/chamilo-lms — see the affected versions and patch details below.
Chamilo LMS CStudio upload flow allows unauthenticated remote code execution
Real-World Exposure
chamilo/chamilo-lmsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Ability to run arbitrary code on the server without authentication.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | chamilo/chamilo-lms | all versions | 2.0.1composer require chamilo/chamilo-lms:^2.0.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for chamilo/chamilo-lms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update chamilo/chamilo-lms to 2.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-45140 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 CVE-2026-45140 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-45140. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-45140 in your dependencies?
O3 Security finds CVE-2026-45140 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.