CVE-2026-92391

CVE-2026-92391

published October 21, 2026

CVSS
—
EPSS
0%
Percentile
19.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00281 · 19.5th percentile
Published
2026-10-21T01:17Z
References (3)
https://curl.se/docs/CVE-2026-92391.html · 2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2026-92391.json · 2499f714-1537-4658-8207-48ae4bb9eae9https://hackerone.com/reports/4024222 · 2499f714-1537-4658-8207-48ae4bb9eae9
EPSS history
Timeline
  • 22 OCT 03:36Z
    EPSS moved — → 0%
    epss
  • 20 OCT 20:24Z
    curl_mime_free stack overflow by recursion
    cvelistv5
  • 20 OCT 20:24Z
    curl_mime_free stack overflow by recursion
    cvelistv5