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OpenAdvisories
Medium · 5.3 CVE-2026-44373 EUVD-2026-30163GHSA-5w89-w975-hf9q

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

Published May 13, 2026 · Updated May 14, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
nitrojs nitro < 3.0.260429-beta —
nitrojs nitropack < 2.13.4 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm nitro < 3.0.260429-beta 3.0.260429-beta GHSA-5w89-w975-hf9q
npm nitropack < 2.13.4 2.13.4 GHSA-5w89-w975-hf9q

References