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CVE-2026-48598

Estado: ModificadaBaja (2.1)—

Improper Encoding or Escaping of Output vulnerability in elixir-tesla tesla allows multipart part header injection via unescaped Content-Disposition parameter values.

Tesla.Multipart.part_headers_for_disposition/1 interpolates each disposition parameter as #{k}="#{v}" with no validation of CR (\r), LF (\n), or double-quote characters. The values come verbatim from the caller via Tesla.Multipart.add_field/4 (the name parameter), Tesla.Multipart.add_file/3, and Tesla.Multipart.add_file_content/4 (both the filename parameter and other disposition opts).

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A " in the value closes the quoted parameter early; a \r\n ends the Content-Disposition header line and starts a new part header (such as a forged Content-Type), or, after a second \r\n, ends the entire part header block and prepends bytes to the part body. The default-filename path in add_file/3 derives the filename via Path.basename/1, which does not strip CR or LF, so any application forwarding a partially-attacker-controlled file path inherits the same issue.

This issue affects tesla: from 0.8.0 before 1.18.3.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Elixir-tesla — Tesla

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-48598",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-48598",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-06-03T14:58:39.064613Z"
        }
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    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 3.7,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "type": "Secondary",
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        "cvssData": {
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          "version": "4.0",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "LOCAL",
          "baseSeverity": "LOW",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/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",
          "exploitMaturity": "NOT_DEFINED",
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          "subIntegrityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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          "repo": "https://github.com/elixir-tesla/tesla",
          "vendor": "elixir-tesla",
          "modules": [
            "'Elixir.Tesla.Multipart'"
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          "product": "tesla",
          "versions": [
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              "version": "0.8.0",
              "lessThan": "1.18.3",
              "versionType": "semver"
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          ],
          "packageURL": "pkg:hex/tesla",
          "packageName": "tesla",
          "programFiles": [
            "lib/tesla/multipart.ex"
          ],
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Tesla.Multipart':part_headers_for_disposition/1"
            },
            {
              "name": "'Elixir.Tesla.Multipart':add_field/4"
            },
            {
              "name": "'Elixir.Tesla.Multipart':add_file/3"
            },
            {
              "name": "'Elixir.Tesla.Multipart':add_file_content/4"
            }
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        {
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          "vendor": "elixir-tesla",
          "modules": [
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          "versions": [
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              "versionType": "git"
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          "packageURL": "pkg:github/elixir-tesla/tesla",
          "packageName": "elixir-tesla/tesla",
          "programFiles": [
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          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Tesla.Multipart':part_headers_for_disposition/1"
            },
            {
              "name": "'Elixir.Tesla.Multipart':add_field/4"
            },
            {
              "name": "'Elixir.Tesla.Multipart':add_file/3"
            },
            {
              "name": "'Elixir.Tesla.Multipart':add_file_content/4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-06-02T20:16:38.847",
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-48598.html",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-tesla/tesla/commit/6ebfdb9abe9c6f119408045b933d82462decd351",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-tesla/tesla/commit/bb1a2c3da2775924d96e3db8e315dcc4d5d2246e",
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      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
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      "url": "https://github.com/elixir-tesla/tesla/security/advisories/GHSA-28jh-g32x-v9v4",
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      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
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      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48598",
      "tags": [
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      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "description": [
        {
          "lang": "en",
          "value": "CWE-116"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Encoding or Escaping of Output vulnerability in elixir-tesla tesla allows multipart part header injection via unescaped Content-Disposition parameter values.\n\nTesla.Multipart.part_headers_for_disposition/1 interpolates each disposition parameter as #{k}=\"#{v}\" with no validation of CR (\\r), LF (\\n), or double-quote characters. The values come verbatim from the caller via Tesla.Multipart.add_field/4 (the name parameter), Tesla.Multipart.add_file/3, and Tesla.Multipart.add_file_content/4 (both the filename parameter and other disposition opts). A \" in the value closes the quoted parameter early; a \\r\\n ends the Content-Disposition header line and starts a new part header (such as a forged Content-Type), or, after a second \\r\\n, ends the entire part header block and prepends bytes to the part body. The default-filename path in add_file/3 derives the filename via Path.basename/1, which does not strip CR or LF, so any application forwarding a partially-attacker-controlled file path inherits the same issue.\n\nThis issue affects tesla: from 0.8.0 before 1.18.3."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de codificación o escape de salida incorrectos en elixir-tesla tesla permite la inyección de encabezados de parte multipart a través de valores de parámetros Content-Disposition sin escape.\n\nTesla.Multipart.part_headers_for_disposition/1 interpola cada parámetro de disposición como #{k}=\"#{v}\" sin validación de caracteres CR (\\r), LF (\\n) o comillas dobles. Los valores provienen textualmente del llamador a través de Tesla.Multipart.add_field/4 (el parámetro 'name'), Tesla.Multipart.add_file/3, y Tesla.Multipart.add_file_content/4 (tanto el parámetro 'filename' como otras opciones de disposición). Una ' en el valor cierra el parámetro entre comillas prematuramente; un \\r\\n termina la línea del encabezado Content-Disposition y comienza un nuevo encabezado de parte (como un Content-Type falsificado), o, después de un segundo \\r\\n, termina todo el bloque de encabezados de parte y antepone bytes al cuerpo de la parte. La ruta de nombre de archivo predeterminada en add_file/3 deriva el nombre de archivo a través de Path.basename/1, que no elimina CR o LF, por lo que cualquier aplicación que reenvíe una ruta de archivo parcialmente controlada por el atacante hereda el mismo problema.\n\nEste problema afecta a tesla: desde 0.8.0 antes de 1.18.3."
    }
  ],
  "lastModified": "2026-09-24T21:17:13.760",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "876BFB6A-2010-4450-9EA4-F4AF4B78F93F",
              "versionEndExcluding": "1.18.3",
              "versionStartIncluding": "0.8.0"
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          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}