CVE-2026-44373

{
  "id": "CVE-2026-44373",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-13T21:16:48.033",
  "lastModified": "2026-10-26T17:10:03.270",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "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."
    },
    {
      "lang": "es",
      "value": "Nitro es un kit de herramientas de servidor de próxima generación. Antes de 3.0.260429-beta, un atacante podría eludir una regla de ruta de proxy enviando un salto de ruta codificado por porcentaje (..%2f) en la URL, haciendo que Nitro reenviara una solicitud que el upstream resolvió fuera del alcance configurado. Esta vulnerabilidad está corregida en 3.0.260429-beta."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "nitrojs",
          "product": "nitro",
          "versions": [
            {
              "version": "< 3.0.260429-beta",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "nitrojs",
          "product": "nitropack",
          "versions": [
            {
              "version": "< 2.13.4",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-14T13:12:25.544148Z",
          "id": "CVE-2026-44373",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:nitro:nitro:*:*:*:*:*:node.js:*:*",
              "versionEndExcluding": "2.13.4",
              "matchCriteriaId": "E81D7EC1-9EE7-4CC1-8DF1-22517FF21CBE"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:nitro:nitro:*:*:*:*:*:node.js:*:*",
              "versionStartExcluding": "2.13.4",
              "versionEndExcluding": "3.0.260429",
              "matchCriteriaId": "A93AAA84-4EDA-4708-8BEC-01E4D566A7B1"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/nitrojs/nitro/pull/4222",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/nitrojs/nitro/pull/4223",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/nitrojs/nitro/releases/tag/v2.13.4",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-beta",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9q",
      "source": "[email protected]",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}