FKIE_CVE-2026-5119

Vulnerability from fkie_nvd - Published: 2026-03-30 07:15 - Updated: 2026-04-01 17:45
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Summary
A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-5119Vendor Advisory, Mitigation
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2452932Issue Tracking, Vendor Advisory
secalert@redhat.comhttps://gitlab.gnome.org/GNOME/libsoup/-/issues/502Exploit, Issue Tracking
Impacted products
Vendor Product Version
gnome libsoup -
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
redhat enterprise_linux 10.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:gnome:libsoup:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "C5BAC4F4-3ACD-4F4D-920C-F920FD2C5472",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una vulnerabilidad en libsoup. Al establecer t\u00faneles HTTPS a trav\u00e9s de un proxy HTTP configurado, las cookies de sesi\u00f3n sensibles se transmiten en texto claro dentro de la solicitud HTTP CONNECT inicial. Un atacante posicionado en la red o un proxy HTTP malicioso puede interceptar estas cookies, lo que podr\u00eda conducir al secuestro potencial de la sesi\u00f3n o a la suplantaci\u00f3n de identidad del usuario."
    }
  ],
  "id": "CVE-2026-5119",
  "lastModified": "2026-04-01T17:45:57.203",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 4.2,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-30T07:15:58.350",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory",
        "Mitigation"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-5119"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452932"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/502"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-319"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Primary"
    }
  ]
}


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Detection rules are retrieved from Rulezet.