{"id":"CVE-2026-44373","state":"PUBLISHED","title":"Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`","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.","publishedAt":"2026-05-13T20:26:28.255Z","updatedAt":"2026-05-14T13:16:50.542Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["nitrojs nitro","nitrojs nitropack"],"affected":[{"vendor":"nitrojs","product":"nitro","versions":[{"version":"< 3.0.260429-beta","status":"affected"}]},{"vendor":"nitrojs","product":"nitropack","versions":[{"version":"< 2.13.4","status":"affected"}]}],"references":["https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9q","https://github.com/nitrojs/nitro/pull/4222","https://github.com/nitrojs/nitro/pull/4223","https://github.com/nitrojs/nitro/releases/tag/v2.13.4","https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-beta"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/44xxx/CVE-2026-44373.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44373","state":"PUBLISHED","datePublished":"2026-05-13T20:26:28.255Z","dateUpdated":"2026-05-14T13:16:50.542Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-05T20:15:20.631Z"},"containers":{"cna":{"title":"Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`","descriptions":[{"lang":"en","value":"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":[{"vendor":"nitrojs","product":"nitro","versions":[{"version":"< 3.0.260429-beta","status":"affected"}]},{"vendor":"nitrojs","product":"nitropack","versions":[{"version":"< 2.13.4","status":"affected"}]}],"references":[{"url":"https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9q","name":"https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9q","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/nitrojs/nitro/pull/4222","name":"https://github.com/nitrojs/nitro/pull/4222","tags":["x_refsource_MISC"]},{"url":"https://github.com/nitrojs/nitro/pull/4223","name":"https://github.com/nitrojs/nitro/pull/4223","tags":["x_refsource_MISC"]},{"url":"https://github.com/nitrojs/nitro/releases/tag/v2.13.4","name":"https://github.com/nitrojs/nitro/releases/tag/v2.13.4","tags":["x_refsource_MISC"]},{"url":"https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-beta","name":"https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-beta","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-13T20:26:28.255Z"},"source":{"advisory":"GHSA-5w89-w975-hf9q","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-14T13:12:25.544148Z","id":"CVE-2026-44373","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-14T13:16:50.542Z"}}]}}}