Nitro: Open Redirect via Protocol-Relative URL Bypass in Wildcard Route Rules
Priority LOW 32CWE-601Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0028 20th percentileScored 2026-11-07
Fix Fixed nitro (nitrojs): 3.0.260429-betanitropack (nitrojs): 2.13.4+2 more products
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nitrojs | nitro | before 3.0.260429-beta | 3.0.260429-beta | Patch available | CNA |
| nitrojs | nitropack | before 2.13.4 | 2.13.4 | Patch available | CNA |
| — | nitro (npm) | before 3.0.260429-beta | 3.0.260429-beta | Patch available | GHSA-9phm-9p8f-hw5m |
| — | nitropack (npm) | before 2.13.4 | 2.13.4 | Patch available | GHSA-9phm-9p8f-hw5m |
- nitro Vendornitrojs Affected before 3.0.260429-beta Fixed in 3.0.260429-beta Patch available CNA
- nitropack Vendornitrojs Affected before 2.13.4 Fixed in 2.13.4 Patch available CNA
- nitro (npm) Vendor— Affected before 3.0.260429-beta Fixed in 3.0.260429-beta Patch available GHSA-9phm-9p8f-hw5m
- nitropack (npm) Vendor— Affected before 2.13.4 Fixed in 2.13.4 Patch available GHSA-9phm-9p8f-hw5m
Remediation
- Fix · CNA nitro (nitrojs) Fixed in 3.0.260429-beta
- Fix · CNA nitropack (nitrojs) Fixed in 2.13.4
- Fix · GHSA-9phm-9p8f-hw5m nitro (npm) Fixed in 3.0.260429-beta Advisory →
- Fix · GHSA-9phm-9p8f-hw5m nitropack (npm) Fixed in 2.13.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44372
- 2026-10-03 Alias added: GHSA-9phm-9p8f-hw5m
References
Advisory 2
More Nitro vulnerabilities
- TI-2026-32330 Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules` CVSS 3.1MEDIUM 5.3
Sources
- CVE-2026-44372 · CVE Program
- CVE-2026-44372 · NVD
- FIRST EPSS
- GHSA-9phm-9p8f-hw5m · GitHub Advisory Database · CC BY 4.0
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