{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18536", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-07-31T20:31:42.315Z", "datePublished": "2026-08-01T10:35:38.392Z", "dateUpdated": "2026-08-01T10:35:38.392Z"}, "containers": {"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": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-08-01T10:35:38.392Z"}, "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"}}}}

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