Path Traversal in Nitro
CVE-2026-44373
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 ou…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.000 (13.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Nitro
- Nitrojs Nitro — versions < 3.0.260429-beta
- Nitrojs Nitropack — versions < 2.13.4
Weakness classification (CWE)
References
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-44373?
- CVE-2026-44373 is a medium-severity vulnerability in Nitro, classified under Path Traversal. CVSS score: 5.3/10. Published 2026-05-13.
- How severe is CVE-2026-44373?
- Medium severity. CVSS v3 base score is 5.3 out of 10.