CVE-2026-44372
CVE-2026-44372 is a Open Redirect vulnerability in nitro. O3 Security confirms whether CVE-2026-44372 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Nitro: Open Redirect via Protocol-Relative URL Bypass in Wildcard Route Rules
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
nitronpmnitropacknpmDescription
Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could turn a redirect route rule using wildcards rewrite into a cross-host redirect by sliding an extra slash in after the rule prefix. This vulnerability is fixed in 3.0.260429-beta.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | nitro | all versions | 3.0.260429-beta |
| 📦npm | nitropack | all versions | 2.13.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nitro. 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 nitro to 3.0.260429-beta or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-44372 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 CVE-2026-44372 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 CVE-2026-44372. 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-2026-44372 in your dependencies?
O3 detects CVE-2026-44372 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.