{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40926",
        "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "state": "PUBLISHED",
        "assignerShortName": "CPANSec",
        "dateReserved": "2025-04-16T09:05:34.362Z",
        "datePublished": "2026-03-05T01:24:34.151Z",
        "dateUpdated": "2026-04-21T02:42:17.296Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "packageName": "Plack-Middleware-Session-Simple",
                    "product": "Plack::Middleware::Session::Simple",
                    "programFiles": [
                        "lib/Plack/Middleware/Session/Simple.pm"
                    ],
                    "programRoutines": [
                        {
                            "name": "Plack::Middleware::Session::Simple::sid_generator"
                        }
                    ],
                    "repo": "https://github.com/kazeburo/Plack-Middleware-Session-Simple",
                    "vendor": "KAZEBURO",
                    "versions": [
                        {
                            "lessThan": "0.05",
                            "status": "affected",
                            "version": "0",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "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."
                }
            ],
            "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": "2026-03-11T23:25:24.779Z"
            },
            "references": [
                {
                    "url": "https://metacpan.org/release/KAZEBURO/Plack-Middleware-Session-Simple-0.04/source/lib/Plack/Middleware/Session/Simple.pm#L43"
                },
                {
                    "tags": [
                        "issue-tracking"
                    ],
                    "url": "https://github.com/kazeburo/Plack-Middleware-Session-Simple/pull/4"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/kazeburo/Plack-Middleware-Session-Simple/commit/760bb358b8f53e52cf415888a4ac858fd99bb24e.patch"
                },
                {
                    "tags": [
                        "vendor-advisory",
                        "related",
                        "vdb-entry"
                    ],
                    "url": "https://www.cve.org/CVERecord?id=CVE-2025-40923"
                },
                {
                    "tags": [
                        "technical-description"
                    ],
                    "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"
                },
                {
                    "tags": [
                        "release-notes"
                    ],
                    "url": "https://metacpan.org/release/KAZEBURO/Plack-Middleware-Session-Simple-0.05/changes"
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Users are advised to upgrade to version 0.05 or later."
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely",
            "workarounds": [
                {
                    "lang": "en",
                    "value": "Users are advised to change the sid_generator attribute of Plack::Middleware::Session::Simple to a function that returns a securely generated session id based on a secure source of entropy from the system.\n\nUsers may consider using Plack::Middleware::Session version 0.35 or later."
                }
            ],
            "x_generator": {
                "engine": "cpansec-cna-tool 0.1"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 9.8,
                            "attackVector": "NETWORK",
                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-05T16:28:14.069463Z",
                                "id": "CVE-2025-40926",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-21T02:42:17.296Z"
                }
            }
        ]
    }
}