{"dataType": "CVE_RECORD", "dataVersion": "5.2", "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"}, "containers": {"cna": {"providerMetadata": {"orgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be", "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": [{"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": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-23T16:19:40.142224Z", "id": "CVE-2026-40470", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-04-23T16:22:27.341Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-40470", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-04-23T16:19:40.142224Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-23T16:19:49.844Z"}}], "cna": {"title": "Hackage package and doc upload stored XSS vulnerability", "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"versions": [{"status": "affected", "version": "0.1", "lessThan": "0.6", "versionType": "semver"}], "packageName": "hackage-server", "collectionURL": "https://hackage.haskell.org/package/hackage-server", "defaultStatus": "unaffected"}], "datePublic": "2026-01-16T14:18:00.000Z", "references": [{"url": "https://osv.dev/vulnerability/HSEC-2024-0004"}], "x_generator": {"engine": "Vulnogram 1.0.1"}, "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": [{"type": "text/html", "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.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')"}]}], "providerMetadata": {"orgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be", "shortName": "redhat-cnalr", "dateUpdated": "2026-04-23T14:53:47.724Z"}}}, "cveMetadata": {"cveId": "CVE-2026-40470", "state": "PUBLISHED", "dateUpdated": "2026-04-23T16:22:27.341Z", "dateReserved": "2026-04-13T15:23:17.067Z", "assignerOrgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be", "datePublished": "2026-04-23T14:53:47.724Z", "assignerShortName": "redhat-cnalr"}, "dataVersion": "5.2"}

{"cveTags": [], "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."}], "id": "CVE-2026-40470", "lastModified": "2026-04-23T16:16:25.523", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "74b3a70d-cca6-4d34-9789-e83b222ae3be", "type": "Secondary"}]}, "published": "2026-04-23T16:16:25.523", "references": [{"source": "74b3a70d-cca6-4d34-9789-e83b222ae3be", "url": "https://osv.dev/vulnerability/HSEC-2024-0004"}], "sourceIdentifier": "74b3a70d-cca6-4d34-9789-e83b222ae3be", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "74b3a70d-cca6-4d34-9789-e83b222ae3be", "type": "Secondary"}]}

{}