{
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    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40470",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-23T16:19:40.142224Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        "providerMetadata": {
          "dateUpdated": "2026-04-23T16:22:27.341Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://hackage.haskell.org/package/hackage-server",
          "defaultStatus": "unaffected",
          "packageName": "hackage-server",
          "versions": [
            {
              "lessThan": "0.6",
              "status": "affected",
              "version": "0.1",
              "versionType": "semver"
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        }
      ],
      "datePublic": "2026-01-16T14:18:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A \u003cstrong\u003ecritical XSS vulnerability\u003c/strong\u003e affected \u003cem\u003ehackage-server\u003c/em\u003e and\n\u003ccode\u003ehackage.haskell.org\u003c/code\u003e.  HTML and JavaScript files provided in source\npackages or via the documentation upload facility were served\n\u003cem\u003eas-is\u003c/em\u003e on the main \u003ccode\u003ehackage.haskell.org\u003c/code\u003e 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 \u003cstrong\u003esession can be hijacked\u003c/strong\u003e to upload packages or\ndocumentation, amend maintainers or other package metadata, or\nperform any other action the user is authorised to do."
            }
          ],
          "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper neutralization of input during web page generation (\u0027cross-site scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-23T14:53:47.724Z",
        "orgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
        "shortName": "redhat-cnalr"
      },
      "references": [
        {
          "url": "https://osv.dev/vulnerability/HSEC-2024-0004"
        }
      ],
      "title": "Hackage package and doc upload stored XSS vulnerability",
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      }
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  "cveMetadata": {
    "assignerOrgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
    "assignerShortName": "redhat-cnalr",
    "cveId": "CVE-2026-40470",
    "datePublished": "2026-04-23T14:53:47.724Z",
    "dateReserved": "2026-04-13T15:23:17.067Z",
    "dateUpdated": "2026-04-23T16:22:27.341Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}