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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:kazeburo:plack\\:\\:middleware\\:\\:session\\:\\:simple:*:*:*:*:*:perl:*:*", "matchCriteriaId": "B99A5199-295A-487A-95D0-2DDF94AFDE71", "versionEndExcluding": "0.05", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely.\n\nThe default session id generator returns a SHA-1 hash seeded with the built-in rand function, the 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\nPredictable session ids could allow an attacker to gain access to systems.\n\nPlack::Middleware::Session::Simple is intended to be compatible with Plack::Middleware::Session, which had a similar security issue CVE-2025-40923."}, {"lang": "es", "value": "Las versiones de Plack::Middleware::Session::Simple hasta la 0.04 para Perl generan identificadores de sesi\u00f3n de forma insegura.\n\nEl generador predeterminado de identificadores de sesi\u00f3n devuelve un hash SHA-1 inicializado con la funci\u00f3n rand incorporada, el tiempo epoch y el PID. El PID provendr\u00e1 de un peque\u00f1o conjunto de n\u00fameros, y el tiempo epoch puede ser adivinado, si no se filtra del encabezado HTTP Date. La funci\u00f3n rand incorporada no es adecuada para uso criptogr\u00e1fico.\n\nLos identificadores de sesi\u00f3n predecibles podr\u00edan permitir a un atacante obtener acceso a los sistemas.\n\nPlack::Middleware::Session::Simple est\u00e1 dise\u00f1ado para ser compatible con Plack::Middleware::Session, que tuvo un problema de seguridad similar CVE-2025-40923."}], "id": "CVE-2025-40926", "lastModified": "2026-03-12T00:16:10.650", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-05T02:16:39.790", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Patch"], "url": "https://github.com/kazeburo/Plack-Middleware-Session-Simple/commit/760bb358b8f53e52cf415888a4ac858fd99bb24e.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/kazeburo/Plack-Middleware-Session-Simple/pull/4"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Issue Tracking", "Product"], "url": "https://metacpan.org/release/KAZEBURO/Plack-Middleware-Session-Simple-0.04/source/lib/Plack/Middleware/Session/Simple.pm#L43"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/KAZEBURO/Plack-Middleware-Session-Simple-0.05/changes"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Third Party Advisory"], "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Third Party Advisory"], "url": "https://www.cve.org/CVERecord?id=CVE-2025-40923"}], "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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