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CVE-2026-69204

Estado: AplazadaCrítica (9.2)—

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Content-Length, so an intermediary and Ember can select different body framing rules. When ember-server is behind a keep-alive intermediary that forwards both headers and frames by Content-Length, an unauthenticated attacker can smuggle a second request, bypass intermediary access controls, poison caches, or cause a victim request to be joined to an attacker-controlled prefix. The shared response parser can also desynchronize an ember-client connection when a malicious or compromised upstream sends both headers. This issue is fixed in versions 0.23.35 and 1.0.0-M47.

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.

Vulnerabilidad de smuggling de solicitudes HTTP en servidor Ember sin validación de headers conflictivos (CWE-444). Vector AV:N/PR:N permite explotación remota no autenticada. Impactos: desvío de flujo de tráfico, envenenamiento de caché, bypass de controles de intermediarios.

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

Network SegmentationVulnerability ScanningUser Account ManagementRestrict File and Directory PermissionsPrivileged Account ManagementLimit Access to Resource Over Network

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Typelevel — Http4sAI

CWE

Referencias

JSON original (NVD)

Mostrar
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          "id": "CVE-2026-69204",
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          "options": [
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-09-15T19:00:36.832324Z"
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          "valueDensity": "NOT_DEFINED",
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  "published": "2026-09-15T19:17:37.580",
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      "url": "https://github.com/http4s/http4s/commit/9feaf8677951a52af906ae9664ff6f0543d9d810",
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  "lastModified": "2026-09-16T20:39:16.610",
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