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    "cveMetadata": {
        "cveId": "CVE-2026-40470",
        "assignerOrgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
        "state": "PUBLISHED",
        "assignerShortName": "redhat-cnalr",
        "dateReserved": "2026-04-13T15:23:17.067Z",
        "datePublished": "2026-04-23T14:53:47.724Z",
        "dateUpdated": "2026-04-23T16:22:27.341Z"
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                "shortName": "redhat-cnalr",
                "dateUpdated": "2026-04-23T14:53:47.724Z"
            },
            "title": "Hackage package and doc upload stored XSS vulnerability",
            "datePublic": "2026-01-16T14:18:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-79",
                            "description": "CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "collectionURL": "https://hackage.haskell.org/package/hackage-server",
                    "packageName": "hackage-server",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0.1",
                            "lessThan": "0.6",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A critical XSS vulnerability affected hackage-server and\nhackage.haskell.org.  HTML and JavaScript files provided in source\npackages or via the documentation upload facility were served\nas-is on the main hackage.haskell.org domain.  As a consequence,\nwhen a user with latent HTTP credentials browses to the package\npages or documentation uploaded by a malicious package maintainer,\ntheir session can be hijacked to upload packages or\ndocumentation, amend maintainers or other package metadata, or\nperform any other action the user is authorised to do.",
                    "supportingMedia": [
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                            "type": "text/html",
                            "base64": false,
                            "value": "A <strong>critical XSS vulnerability</strong> affected <em>hackage-server</em> and\n<code>hackage.haskell.org</code>.  HTML and JavaScript files provided in source\npackages or via the documentation upload facility were served\n<em>as-is</em> on the main <code>hackage.haskell.org</code> domain.  As a consequence,\nwhen a user with latent HTTP credentials browses to the package\npages or documentation uploaded by a malicious package maintainer,\ntheir <strong>session can be hijacked</strong> to upload packages or\ndocumentation, amend maintainers or other package metadata, or\nperform any other action the user is authorised to do."
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://osv.dev/vulnerability/HSEC-2024-0004"
                }
            ],
            "metrics": [
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                    "format": "CVSS",
                    "scenarios": [
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                            "lang": "en",
                            "value": "GENERAL"
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                    ],
                    "cvssV3_1": {
                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "scope": "CHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "LOW",
                        "baseSeverity": "CRITICAL",
                        "baseScore": 9.9,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L"
                    }
                }
            ],
            "x_generator": {
                "engine": "Vulnogram 1.0.1"
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        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-23T16:19:40.142224Z",
                                "id": "CVE-2026-40470",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
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                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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