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{"affected": [{"affectedData": [{"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"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ktat:http\\:\\:session:*:*:*:*:*:perl:*:*", "matchCriteriaId": "DADAF64A-EA4A-4FB2-9988-17FF1D875219", "versionEndIncluding": "0.53", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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."}, {"lang": "es", "value": "Las versiones de HTTP::Session hasta la 0.53 para Perl por defecto utilizan identificadores de sesi\u00f3n generados de forma insegura.\n\nHTTP::Session por defecto utiliza HTTP::Session::ID::SHA1 para generar identificadores de sesi\u00f3n usando un hash SHA-1 sembrado con la funci\u00f3n rand incorporada, el tiempo de \u00e9poca de alta resoluci\u00f3n y el PID. El PID provendr\u00e1 de un peque\u00f1o conjunto de n\u00fameros, y el tiempo de \u00e9poca puede ser adivinado, si no se filtra del encabezado HTTP Date. La funci\u00f3n rand incorporada es inadecuada para uso criptogr\u00e1fico.\n\nLa distribuci\u00f3n incluye HTTP::session::ID::MD5 que contiene una falla similar, pero utiliza el hash MD5 en su lugar."}], "id": "CVE-2026-3256", "lastModified": "2026-06-17T10:43:17.177", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3256", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-01T14:14:27.526725Z", "version": "2.0.3"}}]}, "published": "2026-03-28T19:16:56.570", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Product"], "url": "https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/MD5.pm"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Product"], "url": "https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/SHA1.pm"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Third Party Advisory"], "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/03/28/5"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-338"}, {"lang": "en", "value": "CWE-340"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

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