GHSA-88C6-6JFQ-MM4Q

Vulnerability from github – Published: 2026-07-03 09:31 – Updated: 2026-07-03 09:31
VLAI
Details

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different 'services'.

libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead.

When reusing a connection a range of criteria must be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different services.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-8458"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-03T07:16:24Z",
    "severity": null
  },
  "details": "libcurl might in some circumstances reuse the wrong connection when asked to\ndo Negotiate-authenticated ones, even when they are set to use different\n\u0027services\u0027.\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a request that was issued by an application could\nwrongfully reuse an existing connection to the same server that was\nauthenticated using different services.",
  "id": "GHSA-88c6-6jfq-mm4q",
  "modified": "2026-07-03T09:31:26Z",
  "published": "2026-07-03T09:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8458"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3721183"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-8458.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-8458.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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