CVE-2017-12624

Status: ModifiedMedium (5.5)—💥 PoC

Apache CXF supports sending and receiving attachments via either the JAX-WS or JAX-RS specifications. It is possible to craft a message attachment header that could lead to a Denial of Service (DoS) attack on a CXF web service provider. Both JAX-WS and JAX-RS services are vulnerable to this attack. From Apache CXF 3.2.1 and 3.1.14, message attachment headers that are greater than 300 characters will be rejected by default. This value is configurable via the property "attachment-max-header-size".

CVSS

Version: 3.0
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base score: 5.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 3.70%
Percentile among all scored CVEs: 89
Score date: 10/12/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Apache — CXF

CWEs

NVD-CWE-noinfo

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2017-12624",
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          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
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  "published": "2017-11-14T16:29:00.203",
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  "descriptions": [
    {
      "lang": "en",
      "value": "Apache CXF supports sending and receiving attachments via either the JAX-WS or JAX-RS specifications. It is possible to craft a message attachment header that could lead to a Denial of Service (DoS) attack on a CXF web service provider. Both JAX-WS and JAX-RS services are vulnerable to this attack. From Apache CXF 3.2.1 and 3.1.14, message attachment headers that are greater than 300 characters will be rejected by default. This value is configurable via the property \"attachment-max-header-size\"."
    },
    {
      "lang": "es",
      "value": "Apache CXF es compatible con el envío y la recepción de archivos adjuntos mediante las especificaciones JAX-WS o JAX-RS. Es posible manipular una cabecera de adjunto de mensaje que podría conducir a un ataque de denegación de servicio (DoS) en un proveedor de servicios web de CXF. Tanto los servicios JAX-WS como JAX-RS son vulnerables a este ataque. Desde las versiones 3.2.1 y 3.1.14 de Apache CXF, la cabeceras de adjunto de mensaje de más de 300 caracteres se rechazarán por defecto. Este valor puede configurarse mediante la propiedad \"attachment-max-header-size\"."
    }
  ],
  "lastModified": "2026-06-17T01:03:39.240",
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