FKIE_CVE-2026-48861

Vulnerability from fkie_nvd - Published: 2026-06-02 16:16 - Updated: 2026-07-22 19:10
Severity
2.1 (Low) - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Summary
Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in elixir-mint Mint allows HTTP Request Splitting and HTTP Request Smuggling. In lib/mint/http1/request.ex, the encode_request_line/2 function splices the caller-supplied method and target arguments directly into the HTTP/1 request line without any character validation: [method, ?\s, target, " HTTP/1.1\r\n"]. An application that forwards attacker-controlled input as the HTTP method or target to Mint.HTTP.request/5 is therefore exposed to request-line CRLF injection: the attacker can terminate the request line early, inject arbitrary headers, and smuggle an entirely separate pipelined HTTP request onto the same TCP connection. Mint 1.7.0 introduced validate_request_target/2, which rejects CRLF and other control characters in the target by default and closes the path/query vector unless the caller opts out via skip_target_validation: true. The method field remains unvalidated, so the method-based injection is exploitable under the default Mint configuration on all versions. This issue affects mint: from 0.1.0 before 1.9.0.
References
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://cna.erlef.org/cves/CVE-2026-48861.html
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/elixir-mint/mint/commit/fad091454cbb7449b19edb8e1fee12ca7cf28c3a
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/elixir-mint/mint/security/advisories/GHSA-2pg6-44cx-c49v
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://osv.dev/vulnerability/EEF-CVE-2026-48861
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/elixir-mint/mint/security/advisories/GHSA-2pg6-44cx-c49v
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.Mint.HTTP1.Request\u0027"
          ],
          "packageName": "mint",
          "packageURL": "pkg:hex/mint",
          "product": "mint",
          "programFiles": [
            "lib/mint/http1/request.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Mint.HTTP1.Request\u0027:encode_request_line/2"
            }
          ],
          "repo": "https://github.com/elixir-mint/mint",
          "vendor": "elixir-mint",
          "versions": [
            {
              "lessThan": "1.9.0",
              "status": "affected",
              "version": "0.1.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.Mint.HTTP1.Request\u0027"
          ],
          "packageName": "elixir-mint/mint",
          "packageURL": "pkg:github/elixir-mint/mint",
          "product": "mint",
          "programFiles": [
            "lib/mint/http1/request.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Mint.HTTP1.Request\u0027:encode_request_line/2"
            }
          ],
          "repo": "https://github.com/elixir-mint/mint.git",
          "vendor": "elixir-mint",
          "versions": [
            {
              "lessThan": "fad091454cbb7449b19edb8e1fee12ca7cf28c3a",
              "status": "affected",
              "version": "8db1acff30b6a9433762c18b1e1f891b8c1f74f7",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027) vulnerability in elixir-mint Mint allows HTTP Request Splitting and HTTP Request Smuggling.\n\nIn lib/mint/http1/request.ex, the encode_request_line/2 function splices the caller-supplied method and target arguments directly into the HTTP/1 request line without any character validation: [method, ?\\s, target, \" HTTP/1.1\\r\\n\"]. An application that forwards attacker-controlled input as the HTTP method or target to Mint.HTTP.request/5 is therefore exposed to request-line CRLF injection: the attacker can terminate the request line early, inject arbitrary headers, and smuggle an entirely separate pipelined HTTP request onto the same TCP connection.\n\nMint 1.7.0 introduced validate_request_target/2, which rejects CRLF and other control characters in the target by default and closes the path/query vector unless the caller opts out via skip_target_validation: true. The method field remains unvalidated, so the method-based injection is exploitable under the default Mint configuration on all versions.\n\nThis issue affects mint: from 0.1.0 before 1.9.0."
    },
    {
      "lang": "es",
      "value": "Neutralizaci\u00f3n incorrecta de secuencias CRLF (\u0027Inyecci\u00f3n CRLF\u0027) vulnerabilidad en elixir-mint Mint permite la divisi\u00f3n de solicitudes HTTP (HTTP Request Splitting) y el contrabando de solicitudes HTTP (HTTP Request Smuggling).\n\nEn lib/mint/http1/request.ex, la funci\u00f3n encode_request_line/2 inserta los argumentos de m\u00e9todo y objetivo proporcionados por el llamador directamente en la l\u00ednea de solicitud HTTP/1 sin ninguna validaci\u00f3n de caracteres: [method, ?\\s, target, \" HTTP/1.1\\r\\n\"]. Una aplicaci\u00f3n que reenv\u00eda entrada controlada por el atacante como el m\u00e9todo HTTP o el objetivo a Mint.HTTP.request/5 est\u00e1, por lo tanto, expuesta a la inyecci\u00f3n CRLF en la l\u00ednea de solicitud: el atacante puede terminar la l\u00ednea de solicitud prematuramente, inyectar encabezados arbitrarios y contrabandear una solicitud HTTP canalizada (pipelined) completamente separada en la misma conexi\u00f3n TCP.\n\nMint 1.7.0 introdujo validate_request_target/2, que rechaza CRLF y otros caracteres de control en el objetivo por defecto y cierra el vector de ruta/consulta a menos que el llamador opte por no hacerlo a trav\u00e9s de skip_target_validation: true. El campo del m\u00e9todo permanece sin validar, por lo que la inyecci\u00f3n basada en el m\u00e9todo es explotable bajo la configuraci\u00f3n predeterminada de Mint en todas las versiones.\n\nEste problema afecta a mint: desde 0.1.0 antes de 1.9.0."
    }
  ],
  "id": "CVE-2026-48861",
  "lastModified": "2026-07-22T19:10:00.120",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "LOW",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-48861",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-02T18:11:46.297986Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-02T16:16:44.470",
  "references": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://cna.erlef.org/cves/CVE-2026-48861.html"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/elixir-mint/mint/commit/fad091454cbb7449b19edb8e1fee12ca7cf28c3a"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-2pg6-44cx-c49v"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48861"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-2pg6-44cx-c49v"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-93"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}



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