VulnerabilityAnalyzed
CVE-2026-44373
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.
MEDIUM 5.3EPSS 0.39%
Does this matter?
Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.39% probability · 33th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- nitro/nitro
- Source
- security-advisories@github.com
References
- https://github.com/nitrojs/nitro/pull/4222Issue Tracking, Patch
- https://github.com/nitrojs/nitro/pull/4223Issue Tracking, Patch
- https://github.com/nitrojs/nitro/releases/tag/v2.13.4Release Notes
- https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-betaRelease Notes
- https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9qThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.