{"api_version":"1","generated_at":"2026-08-01T20:43:52+00:00","cve":"CVE-2026-18536","urls":{"html":"https://cve.report/CVE-2026-18536","api":"https://cve.report/api/cve/CVE-2026-18536.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-18536","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-18536"},"summary":{"title":"Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP","description":"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.","state":"PUBLISHED","assigner":"CPANSec","published_at":"2026-08-01 11:16:38","updated_at":"2026-08-01 16:16:30"},"problem_types":["CWE-319","CWE-353","CWE-319 CWE-319 Cleartext Transmission of Sensitive Information","CWE-353 CWE-353 Missing Support for Integrity Check"],"metrics":[],"references":[{"url":"https://metacpan.org/release/RRWO/Data-Entropy-0.010/changes","name":"https://metacpan.org/release/RRWO/Data-Entropy-0.010/changes","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv","name":"https://github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://security.metacpan.org/docs/guides/random-data-for-security.html","name":"https://security.metacpan.org/docs/guides/random-data-for-security.html","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"http://www.openwall.com/lists/oss-security/2026/08/01/8","name":"http://www.openwall.com/lists/oss-security/2026/08/01/8","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUS","name":"https://metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUS","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-18536","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18536","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"RRWO","product":"Data::Entropy","version":"affected 0.010 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[{"source":"CNA","title":"","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.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"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"},"nvd":{"publishedDate":"2026-08-01 11:16:38","lastModifiedDate":"2026-08-01 16:16:30","problem_types":["CWE-319","CWE-353","CWE-319 CWE-319 Cleartext Transmission of Sensitive Information","CWE-353 CWE-353 Missing Support for Integrity Check"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"18536","Ordinal":"1","Title":"Data::Entropy versions before 0.010 for Perl read remote entropy","CVE":"CVE-2026-18536","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"18536","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Data::Entropy versions before 0.010 for Perl read remote entropy"}]}}}