High severity · published May 7, 2026
CVE-2026-33814
Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net
7.5
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
golang.org/x/net/http2 · golang.org/x/net
before 0.53.0 · source: vendor
NE
net/http · Go standard library
before 1.25.10; 1.26.0-0 before 1.26.3 · source: vendor
GO
GO · Golang
before 1.25.10; 1.26.0 before 1.26.3 · source: NVD
HT
Http2 · Golang
before 0.53.0 · source: NVD
AI
Assisted Installer for Red Hat OpenShift Container Platform 2 · Red Hat
All versions, or not specified · source: CISA
BF
Builds for Red Hat OpenShift · Red Hat
All versions, or not specified · source: CISA
CO
Cluster Observability Operator 1.5.0 · Red Hat
All versions, or not specified · source: CISA
CO
Compliance Operator · Red Hat
All versions, or not specified · source: CISA
CC
Confidential Compute Attestation · Red Hat
All versions, or not specified · source: CISA
CM
Custom Metric Autoscaler operator for Red Hat Openshift · Red Hat
All versions, or not specified · source: CISA
DV
Deployment Validation Operator · Red Hat
All versions, or not specified · source: CISA
ES
External Secrets Operator for Red Hat OpenShift · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33814
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33814
Patch
https://go.dev/cl/761581
Patch
https://go.dev/cl/761640
Issue Tracking
https://go.dev/issue/78476
Release Notes
https://groups.google.com/g/golang-announce/c/qcCIEXso47M
Vendor Advisory
https://pkg.go.dev/vuln/GO-2026-4918
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:22112
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