CVE-2026-44373

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

Published May 13, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-5w89-w975-hf9q Nitro has a proxy scope bypass via percent-encoded path traversal in `routeRules`
History
Type Values Removed Values Added
First Time appeared Nitro
Nitro nitro
CPEs cpe:2.3:a:nitro:nitro:*:*:*:*:*:node.js:*:*
Vendors & Products Nitro
Nitro nitro
Type Values Removed Values Added
First Time appeared Nitrojs
Nitrojs nitro
Nitrojs nitropack
Vendors & Products Nitrojs
Nitrojs nitro
Nitrojs nitropack
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 14, 2026, 1:16 PM
Reserved
May 5, 2026, 8:15 PM
Status
Analyzed
Published
May 13, 2026, 9:16 PM
Modified
Oct 26, 2026, 5:10 PM