HTTP/2 Transport Vulnerability in Go Programming Language
CVE-2026-33814

7.5HIGH

Key Information:

Vendor

Golang.org/x/net

Status
Golang.org/x/net/http2
Net/http
Vendor
CVE Published:
7 May 2026

What is CVE-2026-33814?

When the Go programming language processes HTTP/2 SETTINGS frames, it can enter an infinite loop if it receives a SETTINGS_MAX_FRAME_SIZE set to 0. This issue affects the transport layer, leading to a situation where CONTINUATION frames are repeatedly written without resolution, potentially impacting the performance and reliability of applications utilizing the HTTP/2 protocol.

Affected Version(s)

golang.org/x/net/http2 0 < 0.53.0

net/http 0 < 1.25.10

net/http 1.26.0-0 < 1.26.3

References

https://go.dev/cl/761581
https://go.dev/cl/761640
https://go.dev/issue/78476

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Marwan Atia (marwansamir688@gmail.com)
.