CVE-2026-78659: HTTP/2 server memory exhaustion due to Trailer headers in net/http

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-11

Last Updated

2026-10-12

EPSS Score

0.57% (percentile: 45.6%)

Affected Products (1)

Other

• 17793-17084

Revision History

• 2026-10-11: Information published.
• 2026-10-12: Information published.