Vulnerability-Lookup

GHSA-QQMR-6R9W-PMX5

Vulnerability from github – Published: 2026-10-20 21:31 – Updated: 2026-10-20 21:31

Details

When processing an HTTP redirect to a URL containing userinfo (a username:password component), curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl to send a freshly minted Kerberos ticket—generated using the ambient identity of the client process to an untrusted third-party host, effectively bypassing the domain-scoping restrictions normally enforced by the absence of --location-trusted.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-94265"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-20T21:17:22Z",
    "severity": null
  },
  "details": "When processing an HTTP redirect to a URL containing userinfo (a\n`username:password` component), curl might erroneously retain and re-transmit\nthe original host\u0027s HTTP Negotiate authentication state. Consequently, a\nmalicious server can trigger a redirect containing arbitrary userinfo to force\ncurl to send a freshly minted Kerberos ticket\u2014generated using the ambient\nidentity of the client process to an untrusted third-party host, effectively\nbypassing the domain-scoping restrictions normally enforced by the absence of\n`--location-trusted`.",
  "id": "GHSA-qqmr-6r9w-pmx5",
  "modified": "2026-10-20T21:31:09Z",
  "published": "2026-10-20T21:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94265"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/4040551"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-94265.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-94265.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-94265 (GCVE-0-2026-94265)

Vulnerability from cvelistv5 – Published: 2026-10-20 20:26 – Updated: 2026-10-20 20:26

Title

Authorization: Negotiate sent to foreign origin

Summary

When processing an HTTP redirect to a URL containing userinfo (a `username:password` component), curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl to send a freshly minted Kerberos ticket—generated using the ambient identity of the client process to an untrusted third-party host, effectively bypassing the domain-scoping restrictions normally enforced by the absence of `--location-trusted`.

Severity

No CVSS data available.

CWE

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Assigner

curl CNA under the redhat root

CNA scorecard D 46/100 over 59 records in the last 180 days details

References

3 references

URL	Tags
https://curl.se/docs/CVE-2026-94265.json
https://curl.se/docs/CVE-2026-94265.html
https://hackerone.com/reports/4040551

Impacted products

1 product

Vendor	Product	Version
curl	curl	Affected: 8.22.0 , ≤ 8.22.0 (semver) Affected: 8.21.0 , ≤ 8.21.0 (semver)

Credits

Joshua Rogers (Aisle Research) Joshua Rogers (Aisle Research)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThanOrEqual": "8.22.0",
              "status": "affected",
              "version": "8.22.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.21.0",
              "status": "affected",
              "version": "8.21.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Joshua Rogers (Aisle Research)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Joshua Rogers (Aisle Research)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When processing an HTTP redirect to a URL containing userinfo (a\n`username:password` component), curl might erroneously retain and re-transmit\nthe original host\u0027s HTTP Negotiate authentication state. Consequently, a\nmalicious server can trigger a redirect containing arbitrary userinfo to force\ncurl to send a freshly minted Kerberos ticket\u2014generated using the ambient\nidentity of the client process to an untrusted third-party host, effectively\nbypassing the domain-scoping restrictions normally enforced by the absence of\n`--location-trusted`."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-20T20:26:18.061Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "name": "json",
          "url": "https://curl.se/docs/CVE-2026-94265.json"
        },
        {
          "name": "www",
          "url": "https://curl.se/docs/CVE-2026-94265.html"
        },
        {
          "name": "issue",
          "url": "https://hackerone.com/reports/4040551"
        }
      ],
      "title": "Authorization: Negotiate sent to foreign origin"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2026-94265",
    "datePublished": "2026-10-20T20:26:18.061Z",
    "dateReserved": "2026-09-21T09:07:44.636Z",
    "dateUpdated": "2026-10-20T20:26:18.061Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted