CVE-2026-78669

high

Description

A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.

References

https://pkg.go.dev/vuln/GO-2026-6611

https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs

https://groups.google.com/g/golang-announce/c/U2fTuyDJznI

https://go.dev/issue/81742

https://go.dev/cl/847308

https://go.dev/cl/847186

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95426

Details

Source: Mitre, NVD

Published: 2026-10-08

Updated: 2026-10-09

Named Vulnerability: GO-2026-6611

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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