{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-9733",
        "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "state": "PUBLISHED",
        "assignerShortName": "CPANSec",
        "dateReserved": "2026-05-27T17:25:58.644Z",
        "datePublished": "2026-06-23T07:05:20.564Z",
        "dateUpdated": "2026-06-23T14:18:05.692Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "packageName": "Mojolicious-Plugin-Web-Auth",
                    "product": "Mojolicious::Plugin::Web::Auth::OAuth2",
                    "programFiles": [
                        "lib/Mojolicious/Plugin/Web/Auth/OAuth2.pm"
                    ],
                    "programRoutines": [
                        {
                            "name": "Mojolicious::Plugin::Web::Auth::OAuth2::_state_generator"
                        }
                    ],
                    "repo": "https://github.com/hayajo/Mojolicious-Plugin-Web-Auth",
                    "vendor": "HAYAJO",
                    "versions": [
                        {
                            "lessThanOrEqual": "0.17",
                            "status": "affected",
                            "version": "0",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter.\n\nWhen no state generator is specified in the constructor, the module defaults to using a SHA-1 hash of predictable and low-entropy sources, including the epoch time (which is leaked via the HTTP Date header) and a call to Perl's built-in rand function.\n\nA predictable state allows an attacker to hijack another user's session through cross site request forgery (CSRF)."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-59",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-59 Session Credential Falsification through Prediction"
                        }
                    ]
                },
                {
                    "capecId": "CAPEC-62",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-62 Cross Site Request Forgery"
                        }
                    ]
                }
            ],
            "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": "2026-06-23T07:05:20.564Z"
            },
            "references": [
                {
                    "url": "https://metacpan.org/release/HAYAJO/Mojolicious-Plugin-Web-Auth-0.17/source/lib/Mojolicious/Plugin/Web/Auth/OAuth2.pm#L129-131"
                },
                {
                    "tags": [
                        "technical-description"
                    ],
                    "url": "https://datatracker.ietf.org/doc/html/rfc6749#section-10.12"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://security.metacpan.org/patches/M/Mojolicious-Plugin-Web-Auth/0.17/CVE-2026-9733-r2.patch"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter",
            "workarounds": [
                {
                    "lang": "en",
                    "value": "Users should specify a state_generator function in the plugin configuration that uses a secure CSPRNG such as Crypt::PRNG or (for Mojolicious 9.46 or later) the Mojo::Util::random_bytes function.  For example,\n\n  plugin 'Web::Auth',\n    module => 'OAuth2',\n    ...\n    state_generator => sub {\n      unpack(\"H*\", Mojo::Util::random_bytes(20))\n    };"
                }
            ],
            "x_generator": {
                "engine": "cpansec-cna-tool 0.1"
            }
        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2026/06/23/1"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2026-06-23T09:06:58.202Z"
                }
            },
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 9.1,
                            "attackVector": "NETWORK",
                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "NONE",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-23T14:18:00.494484Z",
                                "id": "CVE-2026-9733",
                                "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": "2026-06-23T14:18:05.692Z"
                }
            }
        ]
    }
}