FKIE_CVE-2026-10536

Vulnerability from fkie_nvd - Published: 2026-07-03 07:16 - Updated: 2026-07-03 07:16
Severity
Summary
A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or `CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and finally terminates the handle with `curl_easy_cleanup()`. During this final cleanup phase, libcurl attempts to access and modify an internal structure that was already freed during the reset operation.
References
2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2026-10536.html
2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2026-10536.json
2499f714-1537-4658-8207-48ae4bb9eae9https://hackerone.com/reports/3751697
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThanOrEqual": "8.20.0",
              "status": "affected",
              "version": "8.20.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.0",
              "status": "affected",
              "version": "8.19.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.18.0",
              "status": "affected",
              "version": "8.18.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.17.0",
              "status": "affected",
              "version": "8.17.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.16.0",
              "status": "affected",
              "version": "8.16.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.15.0",
              "status": "affected",
              "version": "8.15.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.1",
              "status": "affected",
              "version": "8.14.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.0",
              "status": "affected",
              "version": "8.14.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.13.0",
              "status": "affected",
              "version": "8.13.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.1",
              "status": "affected",
              "version": "8.12.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.0",
              "status": "affected",
              "version": "8.12.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.1",
              "status": "affected",
              "version": "8.11.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.0",
              "status": "affected",
              "version": "8.11.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.1",
              "status": "affected",
              "version": "8.10.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.0",
              "status": "affected",
              "version": "8.10.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.1",
              "status": "affected",
              "version": "8.9.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.0",
              "status": "affected",
              "version": "8.9.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.8.0",
              "status": "affected",
              "version": "8.8.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.7.1",
              "status": "affected",
              "version": "8.7.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.7.0",
              "status": "affected",
              "version": "8.7.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.6.0",
              "status": "affected",
              "version": "8.6.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.0",
              "status": "affected",
              "version": "8.5.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.4.0",
              "status": "affected",
              "version": "8.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.3.0",
              "status": "affected",
              "version": "8.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.2.1",
              "status": "affected",
              "version": "8.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.2.0",
              "status": "affected",
              "version": "8.2.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.2",
              "status": "affected",
              "version": "8.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.1",
              "status": "affected",
              "version": "8.1.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.0",
              "status": "affected",
              "version": "8.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.0.1",
              "status": "affected",
              "version": "8.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.0.0",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.88.1",
              "status": "affected",
              "version": "7.88.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.88.0",
              "status": "affected",
              "version": "7.88.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A use-after-free vulnerability exists in libcurl when an application\nconfigures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or\n`CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and\nfinally terminates the handle with `curl_easy_cleanup()`. During this final\ncleanup phase, libcurl attempts to access and modify an internal structure\nthat was already freed during the reset operation."
    }
  ],
  "id": "CVE-2026-10536",
  "lastModified": "2026-07-03T07:16:23.563",
  "metrics": {},
  "published": "2026-07-03T07:16:23.563",
  "references": [
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "url": "https://curl.se/docs/CVE-2026-10536.html"
    },
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "url": "https://curl.se/docs/CVE-2026-10536.json"
    },
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "url": "https://hackerone.com/reports/3751697"
    }
  ],
  "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9",
  "vulnStatus": "Received"
}


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