Vulnerability-Lookup

FKIE_CVE-2026-40472

Vulnerability from fkie_nvd - Published: 2026-04-23 16:16 - Updated: 2026-04-24 14:41

Severity ?

9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Summary

In hackage-server, user-controlled metadata from .cabal files are rendered into HTML href attributes without proper sanitization, enabling stored Cross-Site Scripting (XSS) attacks.

References

	URL	Tags
	74b3a70d-cca6-4d34-9789-e83b222ae3be	https://osv.dev/vulnerability/HSEC-2026-0004

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In hackage-server, user-controlled metadata from .cabal files are rendered into HTML\nhref attributes without proper sanitization, enabling stored\nCross-Site Scripting (XSS) attacks."
    }
  ],
  "id": "CVE-2026-40472",
  "lastModified": "2026-04-24T14:41:55.890",
  "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": "2026-04-23T16:16:25.753",
  "references": [
    {
      "source": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
      "url": "https://osv.dev/vulnerability/HSEC-2026-0004"
    }
  ],
  "sourceIdentifier": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
      "type": "Secondary"
    }
  ]
}

CVE-2026-40472 (GCVE-0-2026-40472)

Vulnerability from cvelistv5 – Published: 2026-04-23 15:00 – Updated: 2026-04-23 16:22

Title

Hackage package metadata stored XSS vulnerability

Summary

In hackage-server, user-controlled metadata from .cabal files are rendered into HTML href attributes without proper sanitization, enabling stored Cross-Site Scripting (XSS) attacks.

Severity ?

9.9 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

CWE

CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')

Assigner

redhat-cnalr

References

URL

Tags

https://osv.dev/vulnerability/HSEC-2026-0004

Impacted products

	Vendor	Product	Version
			Affected: 0.1 , < * (semver)

Date Public ?

2026-03-28 19:05

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40472",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-23T16:15:39.611590Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-23T16:22:06.841Z",
          "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": "*",
              "status": "affected",
              "version": "0.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2026-03-28T19:05:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "In hackage-server, user-controlled metadata from \u003ccode\u003e.cabal\u003c/code\u003e files are rendered into HTML\n\u003ccode\u003ehref\u003c/code\u003e attributes without proper sanitization, enabling stored\nCross-Site Scripting (XSS) attacks."
            }
          ],
          "value": "In hackage-server, user-controlled metadata from .cabal files are rendered into HTML\nhref attributes without proper sanitization, enabling stored\nCross-Site Scripting (XSS) attacks."
        }
      ],
      "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": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "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": "2026-04-23T15:00:09.063Z",
        "orgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
        "shortName": "redhat-cnalr"
      },
      "references": [
        {
          "url": "https://osv.dev/vulnerability/HSEC-2026-0004"
        }
      ],
      "title": "Hackage package metadata stored XSS vulnerability",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "74b3a70d-cca6-4d34-9789-e83b222ae3be",
    "assignerShortName": "redhat-cnalr",
    "cveId": "CVE-2026-40472",
    "datePublished": "2026-04-23T15:00:09.063Z",
    "dateReserved": "2026-04-13T15:23:17.068Z",
    "dateUpdated": "2026-04-23T16:22:06.841Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-40472

CVE-2026-40472 (GCVE-0-2026-40472)

Tags

Sightings

Nomenclature