{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-32148",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-30T19:03:06.385106Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-30T19:03:24.858Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/hexpm/hex/security/advisories/GHSA-hmv9-4mfr-m92v"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.Hex.RemoteConverger\u0027"
          ],
          "packageName": "hex",
          "packageURL": "pkg:otp/hex?repository_url=https:%2F%2Fgithub.com%2Fhexpm%2Fhex\u0026vcs_url=git%20https:%2F%2Fgithub.com%2Fhexpm%2Fhex.git",
          "product": "hex",
          "programFiles": [
            "lib/hex/remote_converger.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Hex.RemoteConverger\u0027:verify_resolved/2"
            }
          ],
          "repo": "https://github.com/hexpm/hex",
          "vendor": "hexpm",
          "versions": [
            {
              "lessThan": "2.4.2",
              "status": "affected",
              "version": "0.16.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.Hex.RemoteConverger\u0027"
          ],
          "packageName": "hexpm/hex",
          "packageURL": "pkg:github/hexpm/hex",
          "product": "hex",
          "programFiles": [
            "lib/hex/remote_converger.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Hex.RemoteConverger\u0027:verify_resolved/2"
            }
          ],
          "repo": "https://github.com/hexpm/hex.git",
          "vendor": "hexpm",
          "versions": [
            {
              "lessThan": "d7528c8199a1144511508bf3a6460026a5a14c8e",
              "status": "affected",
              "version": "e01576f28c64af9fae6eb17e2dad30f6efcb303c",
              "versionType": "git"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.4.2",
                  "versionStartIncluding": "0.16.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "AND"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Paul Fleischer"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jonatan M\u00e4nnchen / EEF"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Eric Meadows-J\u00f6nsson / Hex.pm"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Insufficient Verification of Data Authenticity vulnerability in hexpm hex (\u003ctt\u003eHex.RemoteConverger\u003c/tt\u003e module) allows dependency integrity bypass via unverified lockfile checksums.\u003cp\u003eHex stores checksums for dependencies in the \u003ctt\u003emix.lock\u003c/tt\u003e file to ensure reproducible and integrity-checked builds. However, \u003ctt\u003eHex.RemoteConverger.verify_resolved/2\u003c/tt\u003e never executes checksum verification because the lock data returned by \u003ctt\u003eHex.Utils.lock/1\u003c/tt\u003e 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.\u003c/p\u003e\u003cp\u003eAn 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 \u003ctt\u003emix.lock\u003c/tt\u003e file is silently rewritten with the checksum values from the registry, erasing evidence of tampering.\u003c/p\u003e\u003cp\u003eThis issue affects hex: from 0.16.0 before 2.4.2.\u003c/p\u003e"
            }
          ],
          "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.9,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-354",
              "description": "CWE-354 Improper Validation of Integrity Check Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-494",
              "description": "CWE-494 Download of Code Without Integrity Check",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-01T04:33:38.198Z",
        "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "shortName": "EEF"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "related"
          ],
          "url": "https://github.com/hexpm/hex/security/advisories/GHSA-hmv9-4mfr-m92v"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://cna.erlef.org/cves/CVE-2026-32148.html"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://osv.dev/vulnerability/EEF-CVE-2026-32148"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/hexpm/hex/commit/d7528c8199a1144511508bf3a6460026a5a14c8e"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Lockfile checksums not verified in Hex allows dependency integrity bypass",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
    "assignerShortName": "EEF",
    "cveId": "CVE-2026-32148",
    "datePublished": "2026-04-30T18:17:03.783Z",
    "dateReserved": "2026-03-10T22:37:29.213Z",
    "dateUpdated": "2026-05-01T04:33:38.198Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}