CVE-2026-92391 (GCVE-0-2026-92391)

Vulnerability from cvelistv5 – Published: 2026-10-20 20:24 – Updated: 2026-10-30 16:16
VLAI
Title
curl_mime_free stack overflow by recursion
Summary
A deeply nested multipart MIME structure constructed via the public API causes a stack overflow in libcurl during normal cleanup operations. An excessive recursion depth within `curl_mime_free` leads to unbounded stack frame allocation during structure traversal, ultimately crashing the host process.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 16:16 UTC
CWE
Assigner
curl CNA under the redhat root
CNA scorecard D 46/100 over 59 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
curl curl Affected: 8.22.0 , ≤ 8.22.0 (semver)
Affected: 8.21.0 , ≤ 8.21.0 (semver)
Affected: 8.20.0 , ≤ 8.20.0 (semver)
Affected: 8.19.0 , ≤ 8.19.0 (semver)
Affected: 8.18.0 , ≤ 8.18.0 (semver)
Affected: 8.17.0 , ≤ 8.17.0 (semver)
Affected: 8.16.0 , ≤ 8.16.0 (semver)
Affected: 8.15.0 , ≤ 8.15.0 (semver)
Affected: 8.14.1 , ≤ 8.14.1 (semver)
Affected: 8.14.0 , ≤ 8.14.0 (semver)
Affected: 8.13.0 , ≤ 8.13.0 (semver)
Affected: 8.12.1 , ≤ 8.12.1 (semver)
Affected: 8.12.0 , ≤ 8.12.0 (semver)
Affected: 8.11.1 , ≤ 8.11.1 (semver)
Affected: 8.11.0 , ≤ 8.11.0 (semver)
Affected: 8.10.1 , ≤ 8.10.1 (semver)
Affected: 8.10.0 , ≤ 8.10.0 (semver)
Affected: 8.9.1 , ≤ 8.9.1 (semver)
Affected: 8.9.0 , ≤ 8.9.0 (semver)
Affected: 8.8.0 , ≤ 8.8.0 (semver)
Affected: 8.7.1 , ≤ 8.7.1 (semver)
Affected: 8.7.0 , ≤ 8.7.0 (semver)
Affected: 8.6.0 , ≤ 8.6.0 (semver)
Affected: 8.5.0 , ≤ 8.5.0 (semver)
Affected: 8.4.0 , ≤ 8.4.0 (semver)
Affected: 8.3.0 , ≤ 8.3.0 (semver)
Affected: 8.2.1 , ≤ 8.2.1 (semver)
Affected: 8.2.0 , ≤ 8.2.0 (semver)
Affected: 8.1.2 , ≤ 8.1.2 (semver)
Affected: 8.1.1 , ≤ 8.1.1 (semver)
Affected: 8.1.0 , ≤ 8.1.0 (semver)
Affected: 8.0.1 , ≤ 8.0.1 (semver)
Affected: 8.0.0 , ≤ 8.0.0 (semver)
Affected: 7.88.1 , ≤ 7.88.1 (semver)
Affected: 7.88.0 , ≤ 7.88.0 (semver)
Affected: 7.87.0 , ≤ 7.87.0 (semver)
Affected: 7.86.0 , ≤ 7.86.0 (semver)
Affected: 7.85.0 , ≤ 7.85.0 (semver)
Affected: 7.84.0 , ≤ 7.84.0 (semver)
Affected: 7.83.1 , ≤ 7.83.1 (semver)
Affected: 7.83.0 , ≤ 7.83.0 (semver)
Affected: 7.82.0 , ≤ 7.82.0 (semver)
Affected: 7.81.0 , ≤ 7.81.0 (semver)
Affected: 7.80.0 , ≤ 7.80.0 (semver)
Affected: 7.79.1 , ≤ 7.79.1 (semver)
Affected: 7.79.0 , ≤ 7.79.0 (semver)
Affected: 7.78.0 , ≤ 7.78.0 (semver)
Affected: 7.77.0 , ≤ 7.77.0 (semver)
Affected: 7.76.1 , ≤ 7.76.1 (semver)
Affected: 7.76.0 , ≤ 7.76.0 (semver)
Affected: 7.75.0 , ≤ 7.75.0 (semver)
Affected: 7.74.0 , ≤ 7.74.0 (semver)
Affected: 7.73.0 , ≤ 7.73.0 (semver)
Affected: 7.72.0 , ≤ 7.72.0 (semver)
Affected: 7.71.1 , ≤ 7.71.1 (semver)
Affected: 7.71.0 , ≤ 7.71.0 (semver)
Affected: 7.70.0 , ≤ 7.70.0 (semver)
Affected: 7.69.1 , ≤ 7.69.1 (semver)
Affected: 7.69.0 , ≤ 7.69.0 (semver)
Affected: 7.68.0 , ≤ 7.68.0 (semver)
Affected: 7.67.0 , ≤ 7.67.0 (semver)
Affected: 7.66.0 , ≤ 7.66.0 (semver)
Affected: 7.65.3 , ≤ 7.65.3 (semver)
Affected: 7.65.2 , ≤ 7.65.2 (semver)
Affected: 7.65.1 , ≤ 7.65.1 (semver)
Affected: 7.65.0 , ≤ 7.65.0 (semver)
Affected: 7.64.1 , ≤ 7.64.1 (semver)
Affected: 7.64.0 , ≤ 7.64.0 (semver)
Affected: 7.63.0 , ≤ 7.63.0 (semver)
Affected: 7.62.0 , ≤ 7.62.0 (semver)
Affected: 7.61.1 , ≤ 7.61.1 (semver)
Affected: 7.61.0 , ≤ 7.61.0 (semver)
Affected: 7.60.0 , ≤ 7.60.0 (semver)
Affected: 7.59.0 , ≤ 7.59.0 (semver)
Affected: 7.58.0 , ≤ 7.58.0 (semver)
Affected: 7.57.0 , ≤ 7.57.0 (semver)
Affected: 7.56.1 , ≤ 7.56.1 (semver)
Affected: 7.56.0 , ≤ 7.56.0 (semver)
guessed Create a notification for this product.
Show details on NVD website

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              "lessThanOrEqual": "8.11.1",
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          "value": "A deeply nested multipart MIME structure constructed via the public API causes\na stack overflow in libcurl during normal cleanup operations. An excessive\nrecursion depth within `curl_mime_free` leads to unbounded stack frame\nallocation during structure traversal, ultimately crashing the host process."
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          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Joshua Rogers (Aisle Research)"
            },
            {
              "lang": "en",
              "type": "remediation developer",
              "value": "Daniel Stenberg"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "A deeply nested multipart MIME structure constructed via the public API causes\na stack overflow in libcurl during normal cleanup operations. An excessive\nrecursion depth within `curl_mime_free` leads to unbounded stack frame\nallocation during structure traversal, ultimately crashing the host process."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "CWE-674 Uncontrolled Recursion",
                  "lang": "en"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-20T20:24:10.745Z",
            "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
            "shortName": "curl"
          },
          "references": [
            {
              "name": "json",
              "url": "https://curl.se/docs/CVE-2026-92391.json"
            },
            {
              "name": "www",
              "url": "https://curl.se/docs/CVE-2026-92391.html"
            },
            {
              "name": "issue",
              "url": "https://hackerone.com/reports/4024222"
            }
          ],
          "title": "curl_mime_free stack overflow by recursion"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "assignerShortName": "curl",
        "cveId": "CVE-2026-92391",
        "datePublished": "2026-10-20T20:24:10.745Z",
        "dateReserved": "2026-09-16T08:12:51.911Z",
        "dateUpdated": "2026-10-30T16:16:14.958Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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