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CVE-2026-2708

Full vulnerability record from the local CVENow database.

Description

A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values.

Severity
MEDIUM
CVSS score
5.3 (v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-23 22:16:29.233000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
  "id": "CVE-2026-2708",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-23T22:16:29.233",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
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      "value": "A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de contrabando de solicitudes existe en la lógica de análisis de encabezados HTTP/1 de libsoup. La función soup_message_headers_append_common() en libsoup/soup-message-headers.c añade incondicionalmente cada valor de encabezado sin validar campos Content-Length duplicados o en conflicto. Esto permite a un atacante enviar solicitudes HTTP que contienen múltiples encabezados Content-Length con valores diferentes."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
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          "product": "Red Hat Enterprise Linux 10",
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          "packageName": "libsoup3",
          "cpes": [
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        },
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          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4
      },
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          "privilegesRequired": "NONE",
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          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
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    "ssvcV203": [
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        "ssvcData": {
          "timestamp": "2026-04-24T14:53:37.912115Z",
          "id": "CVE-2026-2708",
          "options": [
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          "role": "CISA Coordinator",
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  "weaknesses": [
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      "type": "Secondary",
      "description": [
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  ],
  "configurations": [
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}