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FKIE_CVE-2026-47848

Vulnerability from fkie_nvd - Published: 2026-08-26 20:17 - Updated: 2026-09-04 19:09
Severity
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
In specific scenarios involving WebSocket handshake redirects to a different origin, the Reactor Netty WebSocket client may leak credentials. In order for this to happen, the HTTP client must have been explicitly configured to follow redirects. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier
References
security@vmware.comhttps://spring.io/security/cve-2026-47848Vendor Advisory
Impacted products
Vendor Product Version
broadcom reactor_netty *
broadcom reactor_netty *
broadcom reactor_netty *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Reactor Netty",
          "vendor": "Spring",
          "versions": [
            {
              "lessThanOrEqual": "1.3.6",
              "status": "affected",
              "version": "1.3.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.2.18",
              "status": "affected",
              "version": "1.1.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.0.52",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@vmware.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DE1D5A2A-4549-41CA-A119-9E376FFFEA5D",
              "versionEndExcluding": "1.0.53",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "35B4D929-53C7-4B17-83B2-79976CF8CC26",
              "versionEndExcluding": "1.2.19",
              "versionStartIncluding": "1.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "393A111C-DE4E-4182-87E3-66854B053681",
              "versionEndExcluding": "1.3.6.1",
              "versionStartIncluding": "1.3.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In specific scenarios involving WebSocket handshake redirects to a different origin, the Reactor Netty WebSocket client may leak credentials. In order for this to happen, the HTTP client must have been explicitly configured to follow redirects.\nReactor Netty 1.3.0 - 1.3.6\nReactor Netty 1.1.0 - 1.2.18\nReactor Netty 1.0.52 and earlier"
    }
  ],
  "id": "CVE-2026-47848",
  "lastModified": "2026-09-04T19:09:14.543",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "security@vmware.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-47848",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-26T19:32:14.201075Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-26T20:17:27.070",
  "references": [
    {
      "source": "security@vmware.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://spring.io/security/cve-2026-47848"
    }
  ],
  "sourceIdentifier": "security@vmware.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.