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CVE-2026-32148

Full vulnerability record from the local CVENow database.

Description

Insufficient Verification of Data Authenticity vulnerability in hexpm hex (Hex.RemoteConverger module) allows dependency integrity bypass via unverified lockfile checksums. Hex stores checksums for dependencies in the mix.lock file to ensure reproducible and integrity-checked builds. However, Hex.RemoteConverger.verify_resolved/2 never executes checksum verification because the lock data returned by Hex.Utils.lock/1 uses string-based dependency names, while the verification logic compares against atom-based names. This type mismatch causes the verification code path to be silently skipped. Checksums are still validated when packages are initially downloaded from the registry, but mismatches between the lockfile and resolved dependencies are not detected. An attacker who can influence cached packages (e.g., via local cache poisoning or a compromised registry) can provide modified dependency contents that will be accepted without detection. The mix.lock file is silently rewritten with the checksum values from the registry, erasing evidence of tampering. This issue affects hex: from 0.16.0 before 2.4.2.

Severity
HIGH
CVSS score
8.9 (v4.0)
Vulnerability status
Analyzed
Source identifier
6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Published
2026-04-30 19:16:09
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON 
{
  "id": "CVE-2026-32148",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "published": "2026-04-30T19:16:09.000",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Insufficient Verification of Data Authenticity vulnerability in hexpm hex (Hex.RemoteConverger module) allows dependency integrity bypass via unverified lockfile checksums.\n\nHex stores checksums for dependencies in the mix.lock file to ensure reproducible and integrity-checked builds. However, Hex.RemoteConverger.verify_resolved/2 never executes checksum verification because the lock data returned by Hex.Utils.lock/1 uses string-based dependency names, while the verification logic compares against atom-based names. This type mismatch causes the verification code path to be silently skipped. Checksums are still validated when packages are initially downloaded from the registry, but mismatches between the lockfile and resolved dependencies are not detected.\n\nAn attacker who can influence cached packages (e.g., via local cache poisoning or a compromised registry) can provide modified dependency contents that will be accepted without detection. The mix.lock file is silently rewritten with the checksum values from the registry, erasing evidence of tampering.\n\nThis issue affects hex: from 0.16.0 before 2.4.2."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de verificación insuficiente de la autenticidad de los datos en hexpm hex (módulo Hex.RemoteConverger) permite el bypass de la integridad de las dependencias a través de sumas de verificación de archivos de bloqueo no verificadas.\n\nHex almacena sumas de verificación para las dependencias en el archivo mix.lock para asegurar compilaciones reproducibles y con integridad verificada. Sin embargo, Hex.RemoteConverger.verify_resolved/2 nunca ejecuta la verificación de la suma de verificación porque los datos de bloqueo devueltos por Hex.Utils.lock/1 utilizan nombres de dependencia basados en cadenas, mientras que la lógica de verificación compara con nombres basados en átomos. Esta falta de coincidencia de tipos hace que la ruta del código de verificación se omita silenciosamente. Las sumas de verificación aún se validan cuando los paquetes se descargan inicialmente del registro, pero las discrepancias entre el archivo de bloqueo y las dependencias resueltas no se detectan.\n\nUn atacante que puede influir en los paquetes en caché (por ejemplo, a través de envenenamiento de caché local o un registro comprometido) puede proporcionar contenidos de dependencia modificados que serán aceptados sin detección. El archivo mix.lock se reescribe silenciosamente con los valores de suma de verificación del registro, borrando la evidencia de manipulación.\n\nEste problema afecta a hex: desde 0.16.0 antes de 2.4.2."
    }
  ],
  "affected": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "affectedData": [
        {
          "vendor": "hexpm",
          "product": "hex",
          "defaultStatus": "unaffected",
          "packageName": "hex",
          "cpes": [
            "cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "'Elixir.Hex.RemoteConverger'"
          ],
          "programFiles": [
            "lib/hex/remote_converger.ex"
          ],
          "programRoutines": [
            {
              "name": "'Elixir.Hex.RemoteConverger':verify_resolved/2"
            }
          ],
          "repo": "https://github.com/hexpm/hex",
          "packageURL": "pkg:otp/hex?repository_url=https:%2F%2Fgithub.com%2Fhexpm%2Fhex&vcs_url=git%20https:%2F%2Fgithub.com%2Fhexpm%2Fhex.git",
          "versions": [
            {
              "version": "0.16.0",
              "lessThan": "2.4.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "hexpm",
          "product": "hex",
          "defaultStatus": "unaffected",
          "collectionURL": "https://github.com",
          "packageName": "hexpm/hex",
          "cpes": [
            "cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "'Elixir.Hex.RemoteConverger'"
          ],
          "programFiles": [
            "lib/hex/remote_converger.ex"
          ],
          "programRoutines": [
            {
              "name": "'Elixir.Hex.RemoteConverger':verify_resolved/2"
            }
          ],
          "repo": "https://github.com/hexpm/hex.git",
          "packageURL": "pkg:github/hexpm/hex",
          "versions": [
            {
              "version": "e01576f28c64af9fae6eb17e2dad30f6efcb303c",
              "lessThan": "d7528c8199a1144511508bf3a6460026a5a14c8e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
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        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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",
          "baseScore": 8.9,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "NONE",
          "userInteraction": "ACTIVE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "subAvailabilityImpact": "HIGH",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
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          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-30T19:03:06.385106Z",
          "id": "CVE-2026-32148",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-354"
        },
        {
          "lang": "en",
          "value": "CWE-494"
        }
      ]
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  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:hex:hex:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "0.16.0",
              "versionEndExcluding": "2.4.2",
              "matchCriteriaId": "A7D2A388-56D7-4B82-85AB-6B7C22A6AC18"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-32148.html",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/hexpm/hex/commit/d7528c8199a1144511508bf3a6460026a5a14c8e",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "tags": [
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      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-32148",
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}