Use After Free Affecting libcurl package, versions [7.88.1,8.21.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-LIBCURL-17808162
- published3 Jul 2026
- disclosed3 Jul 2026
- creditUnknown
Introduced: 3 Jul 2026
NewCVE-2026-10536 (opens in a new tab)How to fix?
Upgrade libcurl to version 8.21.0 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the curl_easy_cleanup process after configuring an HTTP/2 stream-dependency tree using CURLOPT_STREAM_DEPENDS or CURLOPT_STREAM_DEPENDS_E and invoking curl_easy_reset. An attacker can cause the application to access freed memory by triggering cleanup operations after a reset, potentially leading to application crashes or execution of arbitrary code. This is only exploitable if the application configures HTTP/2 stream dependencies, calls curl_easy_reset, and then calls curl_easy_cleanup on the same handle.