GHSA-768m-5w34-2xf5 is a high-severity (CVSS 7.5) Broken Cryptographic Algorithm vulnerability in packbackbooks/lti-1-3-php-library. O3 Security confirms whether GHSA-768m-5w34-2xf5 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
LTI 1.3 Tool Library's function used to generate random nonces not sufficiently cryptographically complex before v5.0
Real-World Exposure
packbackbooks/lti-1-3-php-libraryReal-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
The function used to generate random nonces was not sufficiently cryptographically complex. As a result values may be predictable and tokens may be forgable.
Patches
Users should upgrade to version 5.0 immediately
Workarounds
None.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | packbackbooks/lti-1-3-php-library | all versions | 5.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for packbackbooks/lti-1-3-php-library. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update packbackbooks/lti-1-3-php-library to 5.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-768m-5w34-2xf5 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 pinpoints whether GHSA-768m-5w34-2xf5 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-768m-5w34-2xf5. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-768m-5w34-2xf5 in your dependencies?
O3 detects GHSA-768m-5w34-2xf5 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.