High severity · published Oct 14, 2026
CVE-2026-92392
HTTP/2 upload Use-After-Free
8.1
CVSS
1.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CU
curl · curl
8.22.0 through 8.22.0; 8.21.0 through 8.21.0; 8.20.0 through 8.20.0; 8.19.0 through 8.19.0; 8.18.0 through 8.18.0; 8.17.0 through 8.17.0; +7 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-92392
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-92392
curl.se
https://curl.se/docs/CVE-2026-92392.json
curl.se
https://curl.se/docs/CVE-2026-92392.html
hackerone.com
https://hackerone.com/reports/4030333
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