CVE-2026-92392 | HackTesting

During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.

Credits

Luna with Claude

Anthropic

Stefan Eissing

References

https://curl.se/docs/CVE-2026-92392.json

https://curl.se/docs/CVE-2026-92392.html

https://hackerone.com/reports/4030333