CVE-2026-92391

CVSS 7.5 (high) · published 2026-10-20

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.

Weakness: CWE-674

Source: NVD CVE-2026-92391

References

• https://curl.se/docs/CVE-2026-92391.html
• https://curl.se/docs/CVE-2026-92391.json
• https://hackerone.com/reports/4024222
• https://hackerone.com/reports/4024222

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