cve-2026-67354

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright © Red Hat, Inc. All rights reserved.",
      "tlp": {
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        "url": "https://www.first.org/tlp/"
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    "lang": "en",
    "notes": [
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        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67354.json"
      }
    ],
    "title": "guzzlehttp/guzzle: guzzlehttp/guzzle: URI Fragment Disclosure in Referer Header",
    "tracking": {
      "current_release_date": "2026-08-27T15:58:35+00:00",
      "generator": {
        "date": "2026-08-27T15:58:35+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.3.16"
        }
      },
      "id": "CVE-2026-67354",
      "initial_release_date": "2026-08-01T12:22:18.324000+00:00",
      "revision_history": [
        {
          "date": "2026-08-01T12:22:18.324000+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-08-27T15:32:14+00:00",
          "number": "2",
          "summary": "Current version"
        },
        {
          "date": "2026-08-27T15:58:35+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "category": "vendor",
        "name": "Red Hat",
        "product": {
          "name": "All currently supported Red Hat products",
          "product_id": "red_hat_products",
          "product_identification_helper": {
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-67354",
      "discovery_date": "2026-08-01T13:04:18.852474+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "red_hat_products"
          ]
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in guzzlehttp/guzzle. This vulnerability, located in the RedirectMiddleware, can lead to information disclosure. When the optional allow_redirects.referer setting is enabled, the middleware copies the URI fragment (the portion after '#') from a referring request into the generated Referer header during same-scheme redirects. An attacker controlling the redirect destination can read this fragment, potentially exposing sensitive client data such as one-time login secrets or access tokens. The referer setting is disabled by default.",
          "title": "Vulnerability description"
        },
        {
          "category": "other",
          "text": "Community packages in Fedora and EPEL that bundle guzzlehttp/guzzle (nextcloud, roundcubemail) already ship patched versions (7.15.2 and 7.15.3 respectively) that include the fix for this vulnerability, and are therefore not affected. Additionally, exploitation requires the non-default allow_redirects.referer setting to be enabled.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "red_hat_products"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-67354"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-67354",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-67354"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-67354",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67354"
        },
        {
          "category": "external",
          "summary": "https://github.com/guzzle/guzzle/security/advisories/GHSA-h95v-h523-3mw8",
          "url": "https://github.com/guzzle/guzzle/security/advisories/GHSA-h95v-h523-3mw8"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-uri-fragment-disclosure-via-referer",
          "url": "https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-uri-fragment-disclosure-via-referer"
        }
      ],
      "release_date": "2026-08-01T12:22:18.324000+00:00",
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "red_hat_products"
          ]
        }
      ],
      "title": "guzzlehttp/guzzle: guzzlehttp/guzzle: URI Fragment Disclosure in Referer Header"
    }
  ]
}