{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-08-01T15:23:24.896Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/01/8"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Data-Entropy",
          "product": "Data::Entropy",
          "programFiles": [
            "lib/Data/Entropy/RawSource/RandomOrg.pm",
            "lib/Data/Entropy/RawSource/RandomnumbersInfo.pm"
          ],
          "programRoutines": [
            {
              "name": "Data::Entropy::RawSource::RandomOrg::_checkbuf"
            },
            {
              "name": "Data::Entropy::RawSource::RandomOrg::_ensure_buffer"
            },
            {
              "name": "Data::Entropy::RawSource::RandomnumbersInfo::_ensure_buffer"
            }
          ],
          "repo": "https://github.com/robrwo/Data-Entropy",
          "vendor": "RRWO",
          "versions": [
            {
              "lessThan": "0.010",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP.\n\nThe Data::Entropy::RawSource::RandomOrg and Data::Entropy::RawSource::RandomnumbersInfo remote sources are accessed over plain HTTP.\n\nThe Data::Entropy::RawSource::RandomOrg integrity check trivially matches any non-empty byte string.\n\nAny on-path attacker, such as open WiFi, a compromised ISP, captive portal, or a hostile egress proxy substitutes the response and thereby chooses the bytes returned by rand_bits and rand_int for every application that selected one of these sources via with_entropy_source. The _checkbuf method response is equally attacker-controlled, so the retry/sleep behaviour is steerable too."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-319",
              "description": "CWE-319 Cleartext Transmission of Sensitive Information",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-353",
              "description": "CWE-353 Missing Support for Integrity Check",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-01T10:35:38.392Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/RRWO/Data-Entropy-0.010/changes"
        },
        {
          "url": "https://metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUS"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP",
      "workarounds": [
        {
          "lang": "en",
          "value": "Deployments should not use the RandomOrg or RandomnumbersInfo sources, as these are flawed.\n\nThey have been removed from Data::Entropy 0.010. (There was a change to use HTTPS to connect to these sources in version 0.009 that did not work.)\n\nNote that Data::Entropy has been deprecated since version 0.008. Users are advised to migrate to alternative solutions that use system sources of random data, such as Crypt::SysRandom, Crypt::URandom or Crypt::PRNG."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-18536",
    "datePublished": "2026-08-01T10:35:38.392Z",
    "dateReserved": "2026-07-31T20:31:42.315Z",
    "dateUpdated": "2026-08-01T15:23:24.896Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-18536",
      "date": "2026-08-03",
      "epss": "0.00105",
      "percentile": "0.01228"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-18536\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-08-01T11:16:38.483\",\"lastModified\":\"2026-08-03T16:41:32.357\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP.\\n\\nThe Data::Entropy::RawSource::RandomOrg and Data::Entropy::RawSource::RandomnumbersInfo remote sources are accessed over plain HTTP.\\n\\nThe Data::Entropy::RawSource::RandomOrg integrity check trivially matches any non-empty byte string.\\n\\nAny on-path attacker, such as open WiFi, a compromised ISP, captive portal, or a hostile egress proxy substitutes the response and thereby chooses the bytes returned by rand_bits and rand_int for every application that selected one of these sources via with_entropy_source. The _checkbuf method response is equally attacker-controlled, so the retry/sleep behaviour is steerable too.\"}],\"affected\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"affectedData\":[{\"vendor\":\"RRWO\",\"product\":\"Data::Entropy\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://cpan.org/modules\",\"packageName\":\"Data-Entropy\",\"programFiles\":[\"lib/Data/Entropy/RawSource/RandomOrg.pm\",\"lib/Data/Entropy/RawSource/RandomnumbersInfo.pm\"],\"programRoutines\":[{\"name\":\"Data::Entropy::RawSource::RandomOrg::_checkbuf\"},{\"name\":\"Data::Entropy::RawSource::RandomOrg::_ensure_buffer\"},{\"name\":\"Data::Entropy::RawSource::RandomnumbersInfo::_ensure_buffer\"}],\"repo\":\"https://github.com/robrwo/Data-Entropy\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"0.010\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-319\"},{\"lang\":\"en\",\"value\":\"CWE-353\"}]}],\"references\":[{\"url\":\"https://github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUS\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/RRWO/Data-Entropy-0.010/changes\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://security.metacpan.org/docs/guides/random-data-for-security.html\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/08/01/8\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}