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CVE-2025-64458

Estado: AnalizadaAlta (7.5)—

An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8. NFKC normalization in Python is slow on Windows. As a consequence, `django.http.HttpResponseRedirect`, `django.http.HttpResponsePermanentRedirect`, and the shortcut `django.shortcuts.redirect` were subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Seokchan Yoon for reporting this issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Ataque remoto sin autenticación (AV:N/PR:N/UI:N) contra aplicación web Django expuesta; A:H indica DoS. Normalización NFKC lenta permite consumo de recursos via inputs Unicode grandes.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Djangoproject — Django

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-64458",
  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
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          "timestamp": "2025-11-05T16:20:23.751041Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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      "description": [
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      "value": "An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8.\nNFKC normalization in Python is slow on Windows. As a consequence, `django.http.HttpResponseRedirect`, `django.http.HttpResponsePermanentRedirect`, and the shortcut `django.shortcuts.redirect`  were subject to a potential  denial-of-service attack via certain inputs with a very large number of Unicode characters.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Seokchan Yoon for reporting this issue."
    },
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      "value": "Se descubrió un problema en 5.1 anterior a 5.1.14, 4.2 anterior a 4.2.26 y 5.2 anterior a 5.2.8. La normalización NFKC en Python es lenta en Windows. Como consecuencia, 'django.http.HttpResponseRedirect', 'django.http.HttpResponsePermanentRedirect' y el atajo 'django.shortcuts.redirect' estuvieron sujetos a un potencial ataque de denegación de servicio a través de ciertas entradas con un número muy grande de caracteres Unicode. Series de Django anteriores y no compatibles (como 5.0.x, 4.1.x y 3.2.x) no fueron evaluadas y también pueden estar afectadas. Django desea agradecer a Seokchan Yoon por informar este problema."
    }
  ],
  "lastModified": "2026-06-17T09:54:24.323",
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