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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-42608",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-29T00:31:15.725Z",
        "datePublished": "2026-05-11T15:02:15.956Z",
        "dateUpdated": "2026-05-11T16:07:54.454Z"
    },
    "containers": {
        "cna": {
            "title": "Grav: Unauthenticated Path Traversal & Arbitrary File Write in FormFlash component.",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "lang": "en",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
                        "version": "4.0"
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                }
            ],
            "references": [
                {
                    "name": "https://github.com/getgrav/grav/security/advisories/GHSA-hmcx-ch82-3fv2",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/getgrav/grav/security/advisories/GHSA-hmcx-ch82-3fv2"
                }
            ],
            "affected": [
                {
                    "vendor": "getgrav",
                    "product": "grav",
                    "versions": [
                        {
                            "version": "< 2.0.0-beta.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
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                "shortName": "GitHub_M",
                "dateUpdated": "2026-05-11T15:02:15.956Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Grav is a file-based Web platform. Prior to 2.0.0-beta.2, there is a Path Traversal vulnerability within the FormFlash core component. By manipulating the session_id (passed as __form-flash-id in POST requests), an unauthenticated attacker can traverse the filesystem to create arbitrary directories and write an index.yaml file containing attacker-controlled data. This vulnerability can lead to unauthorized modification of application behavior, potential data integrity issues, and service disruption in production environments. This vulnerability is fixed in 2.0.0-beta.2."
                }
            ],
            "source": {
                "advisory": "GHSA-hmcx-ch82-3fv2",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/getgrav/grav/security/advisories/GHSA-hmcx-ch82-3fv2",
                        "tags": [
                            "exploit"
                        ]
                    }
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                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-11T16:07:43.451071Z",
                                "id": "CVE-2026-42608",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
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                ],
                "title": "CISA ADP Vulnrichment",
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                    "dateUpdated": "2026-05-11T16:07:54.454Z"
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}