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CVE-2026-87743

Full vulnerability record from the local CVENow database.

Description

A flaw was found in Quarkus HTTP security. An unauthenticated attacker can exploit a discrepancy in how paths are normalized between the security matcher and HTTP request dispatchers. This allows the attacker to craft a URL that the security matcher considers public, but which is then routed to a protected endpoint, leading to an authorization bypass and potential unauthorized access to sensitive information.

Severity
HIGH
CVSS score
7.5 (v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-18 10:17:07.520000
Last modified
2026-10-29 18:17:36.143000
View original CVE JSON
{
  "id": "CVE-2026-87743",
  "sourceIdentifier": "[email protected]",
  "published": "2026-09-18T10:17:07.520",
  "lastModified": "2026-10-29T18:17:36.143",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Quarkus HTTP security. An unauthenticated attacker can exploit a discrepancy in how paths are normalized between the security matcher and HTTP request dispatchers. This allows the attacker to craft a URL that the security matcher considers public, but which is then routed to a protected endpoint, leading to an authorization bypass and potential unauthorized access to sensitive information."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
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          "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
          "packageName": "quarkus-vertx-http",
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            "cpe:/a:redhat:quarkus:3.27::el8"
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat build of Quarkus 3.33.3.SP2",
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          "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
          "packageName": "quarkus-vertx-http",
          "cpes": [
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          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat OpenShift Dev Spaces 3.31",
          "defaultStatus": "affected",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "packageName": "devspaces/multicluster-redirector-rhel9",
          "cpes": [
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          ],
          "versions": [
            {
              "version": "1792491532",
              "lessThan": "*",
              "versionType": "rpm",
              "status": "unaffected"
            }
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Exploit Intelligence",
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          "packageName": "exploit-intelligence/agent-client-rhel9",
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          "vendor": "Red Hat",
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        },
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  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-09-22T14:15:59.292451Z",
          "id": "CVE-2026-87743",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-551"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:69440",
      "source": "[email protected]"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:69470",
      "source": "[email protected]"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:90321",
      "source": "[email protected]"
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-87743",
      "source": "[email protected]"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2530523",
      "source": "[email protected]"
    }
  ]
}