FKIE_CVE-2026-33242

Vulnerability from fkie_nvd - Published: 2026-03-24 00:16 - Updated: 2026-06-17 10:37
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Salvo is a Rust web framework. Versions 0.39.0 through 0.89.2 have a Path Traversal and Access Control Bypass vulnerability in the salvo-proxy component. The vulnerability allows an unauthenticated external attacker to bypass proxy routing constraints and access unintended backend paths (e.g., protected endpoints or administrative dashboards). This issue stems from the encode_url_path function, which fails to normalize "../" sequences and inadvertently forwards them verbatim to the upstream server by not re-encoding the "." character. Version 0.89.3 contains a patch.
References
security-advisories@github.comhttps://github.com/salvo-rs/salvo/commit/7bac30e6960355c58e358e402072d4a3e5c4e1bb#diff-e319bf7afcb577f7e9f4fb767005072f6335d23f306dd52e8c94f3d222610d02R20Patch
security-advisories@github.comhttps://github.com/salvo-rs/salvo/releases/tag/v0.89.3Product, Release Notes
security-advisories@github.comhttps://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4Exploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4Exploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
salvo salvo *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "salvo",
          "vendor": "salvo-rs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.39.0, \u003c 0.89.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:salvo:salvo:*:*:*:*:*:rust:*:*",
              "matchCriteriaId": "7449C04F-284B-49D5-97EC-527C92EDA4D9",
              "versionEndExcluding": "0.89.3",
              "versionStartIncluding": "0.39.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Salvo is a Rust web framework. Versions 0.39.0 through 0.89.2 have a Path Traversal and Access Control Bypass vulnerability in the salvo-proxy component. The vulnerability allows an unauthenticated external attacker to bypass proxy routing constraints and access unintended backend paths (e.g., protected endpoints or administrative dashboards). This issue stems from the encode_url_path function, which fails to normalize \"../\" sequences and inadvertently forwards them verbatim to the upstream server by not re-encoding the \".\" character. Version 0.89.3 contains a patch."
    },
    {
      "lang": "es",
      "value": "Salvo es un framework web de Rust. Las versiones 0.39.0 a 0.89.2 tienen una vulnerabilidad de salto de ruta y omisi\u00f3n de control de acceso en el componente salvo-proxy. La vulnerabilidad permite a un atacante externo no autenticado omitir las restricciones de enrutamiento del proxy y acceder a rutas de backend no deseadas (p. ej., puntos finales protegidos o paneles administrativos). Este problema se origina en la funci\u00f3n encode_url_path, que no normaliza las secuencias \u0027../\u0027 y las reenv\u00eda inadvertidamente tal cual al servidor ascendente al no volver a codificar el car\u00e1cter \u0027.\u0027. La versi\u00f3n 0.89.3 contiene un parche."
    }
  ],
  "id": "CVE-2026-33242",
  "lastModified": "2026-06-17T10:37:10.720",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33242",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-24T14:13:09.802021Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-24T00:16:29.670",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
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      "url": "https://github.com/salvo-rs/salvo/commit/7bac30e6960355c58e358e402072d4a3e5c4e1bb#diff-e319bf7afcb577f7e9f4fb767005072f6335d23f306dd52e8c94f3d222610d02R20"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/salvo-rs/salvo/releases/tag/v0.89.3"
    },
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      "tags": [
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      "url": "https://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4"
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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