GHSA-rgjg-66cx-5x9m is a critical-severity (CVSS 9.8) Improper Authentication vulnerability in github.com/grafana/grafana. 3 public exploit references exist, so weaponization risk is real. O3 Security confirms whether GHSA-rgjg-66cx-5x9m is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Grafana Authentication Bypass
Real-World Exposure
github.com/grafana/grafana🐹github.com/grafana/grafanaReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Grafana before 4.6.4 and 5.x before 5.2.3 allows authentication bypass because an attacker can generate a valid "remember me" cookie knowing only a username of an LDAP or OAuth user.
Specific Go Packages Affected
github.com/grafana/grafana/pkg/api
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/grafana/grafana | all versions | 4.6.4 |
| 🐹Go | github.com/grafana/grafana | ≥ 5.0.0&&< 5.2.3 | 5.2.3 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/grafana/grafana. 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 github.com/grafana/grafana to 4.6.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-rgjg-66cx-5x9m 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-rgjg-66cx-5x9m 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-rgjg-66cx-5x9m. 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-rgjg-66cx-5x9m in your dependencies?
O3 detects GHSA-rgjg-66cx-5x9m across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.