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TI-2026-32330 Aliases CVE-2026-44373GHSA-5w89-w975-hf9q

Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`

Priority MEDIUM 57CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could bypass a proxy route rule by sending percent-encoded path traversal (..%2f) in the URL, causing Nitro to forward a request that the upstream resolved outside the configured scope. This vulnerability is fixed in 3.0.260429-beta.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00453 39th 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
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nitrojsnitrobefore 3.0.260429-beta3.0.260429-betaPatch availableCNA
nitrojsnitropackbefore 2.13.42.13.4Patch availableCNA
—nitro (npm)before 3.0.260429-beta3.0.260429-betaPatch availableGHSA-5w89-w975-hf9q
—nitropack (npm)before 2.13.42.13.4Patch availableGHSA-5w89-w975-hf9q
  • 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-5w89-w975-hf9q
  • nitropack (npm) Vendor— Affected before 2.13.4 Fixed in 2.13.4 Patch available GHSA-5w89-w975-hf9q

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nitro:nitro:*:*:*:*:*:node.js:*:*before 2.13.4; after 2.13.4, before 3.0.260429VulnerableNitro
  • cpe:2.3:a:nitro:nitro:*:*:*:*:*:node.js:*:* Versions before 2.13.4; after 2.13.4, before 3.0.260429 Vulnerable ·Nitro

Remediation

  • Fix · CNA nitro (nitrojs) Fixed in 3.0.260429-beta
  • Fix · CNA nitropack (nitrojs) Fixed in 2.13.4
  • Fix · GHSA-5w89-w975-hf9q nitro (npm) Fixed in 3.0.260429-beta Advisory →
  • Fix · GHSA-5w89-w975-hf9q nitropack (npm) Fixed in 2.13.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44373
  2. 2026-10-03 Alias added: GHSA-5w89-w975-hf9q

References

Patch 2

Advisory 2

Other 3

  • TI-2026-32329 Nitro: Open Redirect via Protocol-Relative URL Bypass in Wildcard Route Rules CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences