CVE-2026-44373CWE-22

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

Medium · published May 13, 2026

CVSS v3.1
5.3
EPSS
1%
Percentile
46.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00574 · 46.6th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-05-13T20:26Z
EPSS history
Timeline
  • 13 MAY 20:26Z
    Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`
    cvelistv5