GHSA-wfrj-qqc2-83cm is a medium-severity (CVSS 5.8) remote code execution vulnerability in ghost. O3 Security confirms whether GHSA-wfrj-qqc2-83cm is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Remote command injection when using sendmail email transport
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
ghostnpmDescription
Impact
Sites using the sendmail transport as part of their mail config are vulnerable to remote command injection due to a vulnerability in the nodemailer dependency.
Ghost defaults to the direct transport so this is only exploitable if the sendmail transport is explicitly used.
Patches
Fixed in 4.15.0, all sites should upgrade as soon as possible.
Workarounds
- Use an alternative email transport as described in the docs.
For more information
If you have any questions or comments about this advisory:
- email us at [email protected]
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | ghost | all versions | 4.15.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ghost. 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 ghost to 4.15.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wfrj-qqc2-83cm 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-wfrj-qqc2-83cm 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-wfrj-qqc2-83cm. 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-wfrj-qqc2-83cm in your dependencies?
O3 detects GHSA-wfrj-qqc2-83cm across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.