Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-10-01 09:29

Modified

2026-10-01 09:55

Summary

Cross-origin credential leak in HTTP stream wrapper redirects

Details

When the http:// stream wrapper follows a redirect it forwards the user-supplied Authorization, Cookie and Proxy-Authorization headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 ( CVE-2018-1000007 https://github.com/advisories/GHSA-g7x2-hrfp-pv5f ).

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "libphp",
        "purl": "pkg:bitnami/libphp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.2.0"
            },
            {
              "fixed": "8.2.34"
            },
            {
              "introduced": "8.3.0"
            },
            {
              "fixed": "8.3.35"
            },
            {
              "introduced": "8.4.0"
            },
            {
              "fixed": "8.4.26"
            },
            {
              "introduced": "8.5.0"
            },
            {
              "fixed": "8.5.11"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-91766"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "When the http:// stream wrapper follows a redirect it forwards the user-supplied Authorization, Cookie and Proxy-Authorization headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 ( CVE-2018-1000007 https://github.com/advisories/GHSA-g7x2-hrfp-pv5f ).",
  "id": "BIT-libphp-2026-91766",
  "modified": "2026-10-01T09:55:18.588Z",
  "published": "2026-10-01T09:29:24.035Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/php/php-src/security/advisories/GHSA-fpwc-w8rq-cr92"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91766"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Cross-origin credential leak in HTTP stream wrapper redirects"
}

CVE-2026-91766 (GCVE-0-2026-91766)

Vulnerability from cvelistv5 – Published: 2026-09-25 20:40 – Updated: 2026-09-28 13:31

Title

Cross-origin credential leak in HTTP stream wrapper redirects

Summary

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 12:56 UTC

CWE

Assigner

php mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/php/php-src/security/advisorie…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
PHP Group	PHP	Affected: 8.2.* , < 8.2.34 (semver) Affected: 8.3.* , < 8.3.35 (semver) Affected: 8.4.* , < 8.4.26 (semver) Affected: 8.5.* , < 8.5.11 (semver)

Credits

@q2a3z (GitHub) Ilia Alshanetsky Alexandre Daubois Tim Düsterhus Arnaud Le Blanc Jakub Zelenka

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-91766",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-28T12:56:20.823835Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-28T13:31:31.921Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "ext-standard",
          "product": "PHP",
          "vendor": "PHP Group",
          "versions": [
            {
              "lessThan": "8.2.34",
              "status": "affected",
              "version": "8.2.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.3.35",
              "status": "affected",
              "version": "8.3.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.4.26",
              "status": "affected",
              "version": "8.4.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.5.11",
              "status": "affected",
              "version": "8.5.*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "reporter",
          "value": "@q2a3z (GitHub)"
        },
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          "lang": "en",
          "type": "reporter",
          "value": "Ilia Alshanetsky"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Alexandre Daubois"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Tim D\u00fcsterhus"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Arnaud Le Blanc"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Jakub Zelenka"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eWhen the \u003ccode\u003ehttp://\u003c/code\u003e stream wrapper follows a redirect it forwards the user-supplied \u003ccode\u003eAuthorization\u003c/code\u003e, \u003ccode\u003eCookie\u003c/code\u003e and \u003ccode\u003eProxy-Authorization\u003c/code\u003e headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 (\u003ca title=\"CVE-2018-1000007\" href=\"https://github.com/advisories/GHSA-g7x2-hrfp-pv5f\"\u003eCVE-2018-1000007\u003c/a\u003e).\u003c/p\u003e"
            }
          ],
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        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "CWE-200"
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      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          },
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          "scenarios": [
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              "type": "CWE"
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        {
          "descriptions": [
            {
              "cweId": "CWE-522",
              "description": "CWE-522",
              "lang": "en",
              "type": "CWE"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T20:40:25.040Z",
        "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
        "shortName": "php"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/php/php-src/security/advisories/GHSA-fpwc-w8rq-cr92"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Cross-origin credential leak in HTTP stream wrapper redirects",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
    "assignerShortName": "php",
    "cveId": "CVE-2026-91766",
    "datePublished": "2026-09-25T20:40:25.040Z",
    "dateReserved": "2026-09-15T00:38:24.146Z",
    "dateUpdated": "2026-09-28T13:31:31.921Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerability from bitnami_vulndb

CVE-2026-91766 (GCVE-0-2026-91766)

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