CVE-2026-78659 Go HTTP Server - Denial of Service

Go HTTP server contains a denial of service vulnerability caused by excessive 'Trailer' headers in HTTP/2 requests, letting remote attackers exhaust server memory, exploit requires HTTP/2 protocol support.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.57% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
8 October 2026
Updated
15 October 2026
Weakness
CWE-405

Vendor fix

Update to the latest version with fixes for HTTP/2 Trailer header memory allocation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs