{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-3256", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-02-26T11:59:23.755Z", "datePublished": "2026-03-28T18:52:39.917Z", "dateUpdated": "2026-03-28T20:06:47.537Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "http-session", "product": "HTTP::Session", "programRoutines": [{"name": "HTTP::Session::ID::SHA1::generate_id"}, {"name": "HTTP::Session::ID::MD5::generate_id"}], "repo": "https://github.com/tokuhirom/http-session", "vendor": "KTAT", "versions": [{"lessThanOrEqual": "0.53", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "HTTP::Session versions through 0.53 for Perl defaults to using insecurely generated session ids.\n\nHTTP::Session defaults to using HTTP::Session::ID::SHA1 to generate session ids using a SHA-1 hash seeded with the built-in rand function, the high resolution epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.\n\nThe distribution includes HTTP::session::ID::MD5 which contains a similar flaw, but uses the MD5 hash instead."}], "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-340", "description": "CWE-340 Generation of Predictable Numbers or Identifiers", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-338", "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-03-28T18:52:39.917Z"}, "references": [{"url": "https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/SHA1.pm"}, {"url": "https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/MD5.pm"}, {"tags": ["technical-description"], "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}], "source": {"discovery": "UNKNOWN"}, "title": "HTTP::Session versions through 0.53 for Perl defaults to using insecurely generated session ids", "workarounds": [{"lang": "en", "value": "Users on systems with a /dev/urandom device should configure the module to use HTTP::Session::ID::Urandom.\n\nUsers on systems without a /dev/urandom (such as Windows) device will need to create custom ID modules that make use of module such as Crypt::SysRandom or Crypt::URandom."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/03/28/5"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-03-28T20:06:47.537Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "HTTP::Session versions through 0.53 for Perl defaults to using insecurely generated session ids.\n\nHTTP::Session defaults to using HTTP::Session::ID::SHA1 to generate session ids using a SHA-1 hash seeded with the built-in rand function, the high resolution epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.\n\nThe distribution includes HTTP::session::ID::MD5 which contains a similar flaw, but uses the MD5 hash instead."}], "id": "CVE-2026-3256", "lastModified": "2026-03-28T19:16:56.570", "metrics": {}, "published": "2026-03-28T19:16:56.570", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/MD5.pm"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/SHA1.pm"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-338"}, {"lang": "en", "value": "CWE-340"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{}