CVE-2026-49452

{
  "id": "CVE-2026-49452",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T18:17:49.147",
  "lastModified": "2026-10-22T22:10:00.250",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "WeasyPrint helps web developers to create PDF documents. Prior to 69.0, WeasyPrint embeds unescaped HTML presentational-hint attribute values into CSS in weasyprint/css/__init__.py when presentational_hints=True. The background attribute is inserted into a background-image:url() declaration and parsed by tinycss2.parse_blocks_contents(), allowing untrusted HTML to inject additional CSS declarations. Applications that render untrusted HTML with presentational hints enabled can be affected by CSS injection and server-side requests through injected url() values. This issue is fixed in version 69.0."
    },
    {
      "lang": "es",
      "value": "WeasyPrint ayuda a los desarrolladores web a crear documentos PDF. Antes de la versión 69.0, WeasyPrint incrusta valores de atributos de sugerencia presentacional HTML sin escapar en CSS en weasyprint/css/__init__.py cuando presentational_hints=True. El atributo background se inserta en una declaración background-image:url() y es analizado por tinycss2.parse_blocks_contents(), permitiendo que HTML no confiable inyecte declaraciones CSS adicionales. Las aplicaciones que renderizan HTML no confiable con las sugerencias presentacionales habilitadas pueden verse afectadas por inyección CSS y solicitudes del lado del servidor a través de valores url() inyectados. Este problema se ha solucionado en la versión 69.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Kozea",
          "product": "WeasyPrint",
          "versions": [
            {
              "version": "< 69.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-19T15:12:11.871495Z",
          "id": "CVE-2026-49452",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Kozea/WeasyPrint/commit/e158264e33fa399b29f415d30719c1d85a55df1d",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Kozea/WeasyPrint/pull/2773",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Kozea/WeasyPrint/releases/tag/v69.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}