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CVE-2021-33193

Estado: AnalizadaAlta (7.5)—

A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.

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).

Tecnologías afectadas (6)

Apache — Http ServerDebian — Debian LinuxFedoraproject — FedoraOracle — Secure BackupOracle — ZFS Storage Appliance KITTenable — Tenable.sc

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-33193",
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          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
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          "confidentialityImpact": "NONE"
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          "attackComplexity": "LOW",
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      "lang": "en",
      "value": "A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48."
    },
    {
      "lang": "es",
      "value": "Un método diseñado enviado mediante HTTP/2 omitirá la comprobación y será reenviado por mod_proxy, lo que puede conllevar a la división de peticiones o el envenenamiento de la caché. Este problema afecta a Apache HTTP Server versiones 2.4.17 a 2.4.48."
    }
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  "lastModified": "2026-06-17T03:54:19.957",
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