CVE-2026-33814

HIGH

Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

Title source: cna

Description

When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.

References (5)

Core 5

Core References

https://go.dev/cl/761581

https://go.dev/cl/761640

https://go.dev/issue/78476

https://groups.google.com/g/golang-announce/c/qcCIEXso47M

https://pkg.go.dev/vuln/GO-2026-4918

Scores

CVSS v3 7.5

EPSS 0.0002

EPSS Percentile 5.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-835

Status published

Products (5)

Go standard library/net/http < 1.25.10

Go standard library/net/http 1.26.0-0 - 1.26.3

golang/go < 1.25.10

golang/http2 < 0.53.0

golang.org/x/net/golang.org/x/net/http2 < 0.53.0

Published May 07, 2026

Tracked Since May 08, 2026