GHSA-6g3c-2mh5-7q6x is a critical-severity (CVSS 9.1) CWE-347 vulnerability in com.manydesigns:portofino-dispatcher. O3 Security confirms whether GHSA-6g3c-2mh5-7q6x is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Missing validation of JWT signature in `ManyDesigns/Portofino`
Real-World Exposure
com.manydesigns:portofino-dispatcher☕com.manydesigns:portofino-coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT.
Patches
The issue will be patched in the upcoming 5.2.1 release.
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/ManyDesigns/Portofino
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.manydesigns:portofino-dispatcher | ≥ 5.0.0&&< 5.2.1 | 5.2.1 |
| ☕Maven | com.manydesigns:portofino-core | ≥ 5.0.0&&< 5.2.1 | 5.2.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.manydesigns:portofino-dispatcher. 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 com.manydesigns:portofino-dispatcher to 5.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6g3c-2mh5-7q6x 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-6g3c-2mh5-7q6x 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-6g3c-2mh5-7q6x. 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-6g3c-2mh5-7q6x in your dependencies?
O3 detects GHSA-6g3c-2mh5-7q6x across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.