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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Curl
  • Curl
Redhat
  • Hummingbird

No data.

Package CPE Advisory Released Date
Red Hat Hardened Images
rust-main-1.99.0-1.hum1 cpe:/a:redhat:hummingbird:1 RHSA-2026:80349 2026-10-11T00:00:00Z
curl-main-8.23.0-0.1.hum1 cpe:/a:redhat:hummingbird:1 RHSA-2026:82895 2026-10-14T00:00:00Z
References
Link Providers
http://www.openwall.com/lists/oss-security/2026/10/18/5 cve-icon
http://www.openwall.com/lists/oss-security/2026/10/18/6 cve-icon
https://curl.se/docs/CVE-2026-92392.html cve-icon cve-icon
https://curl.se/docs/CVE-2026-92392.json cve-icon cve-icon
https://hackerone.com/reports/4030333 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-92392 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-92392 cve-icon
History

Tue, 20 Oct 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Sun, 18 Oct 2026 23:30:00 +0000

Type Values Removed Values Added
References

Sun, 18 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
References

Sat, 17 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 15 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-416
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

 cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important

Thu, 15 Oct 2026 07:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Wed, 14 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Wed, 14 Oct 2026 08:00:00 +0000

Type Values Removed Values Added
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.
Title HTTP/2 upload Use-After-Free
References
cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published: 2026-10-14T07:46:15.160Z

Updated: 2026-10-20T20:25:06.818Z

Reserved: 2026-09-16T08:12:53.407Z

Link: CVE-2026-92392

cve-icon Vulnrichment

Updated: 2026-10-18T23:06:21.435Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-14T08:17:05.997

Modified: 2026-10-18T23:16:57.163

Link: CVE-2026-92392

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-14T12:00:00Z

Links: CVE-2026-92392 - Bugzilla