CVE-2026-92392

During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason…

Risk score: 65/100
CVSS: 8.1 v3.1
Exploit chance (30 days): 0.9%
Published: 14 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is: 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.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Amber

CVSS 8.1 high
Remotely exploitable without logging in

References

https://curl.se/docs/CVE-2026-92392.html
https://curl.se/docs/CVE-2026-92392.json
https://hackerone.com/reports/4030333
http://www.openwall.com/lists/oss-security/2026/10/18/5
http://www.openwall.com/lists/oss-security/2026/10/18/6
https://hackerone.com/reports/4030333

Original description

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.

Last activity 14 Oct 2026. Patch Forecast updates every hour.