High 7.5Published May 7, 2026

CVE-2026-33814Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

Updated under an hour ago (Oct 27, 2026, 10:10 PM ET)

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It affects golang.org/x/net/http2 and 59 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for golang.org/x/net/http2

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-835, CWE-606
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Go
NVD analysis: Modified
Record last updated: Sep 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

golang.org/x/net golang.org/x/net/http2 golang.org_x_net:http2 (from the name)	before 0.53.0	CNA record
Go standard library net/http go_standard_library:net_http (from the name)	before 1.25.10; from 1.26.0-0 before 1.26.3	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:1.26.3-4.el10_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:1.26.5-1.el10_0 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions redhat:rhel_e4s	from 0:1.26.5-1.el9_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus	from 0:1.26.5-1.el9_6 not affected	CISA ADP
Red Hat Red Hat OpenShift Container Platform 4.16 redhat:openshift	from 0:4.16.69-202608202336.p0.g763478c.assembly.4.16.69.el9 not affected	CISA ADP
Red Hat Cluster Observability Operator 1.5.0 redhat:cluster_observability_operator	from 1782840519 not affected	CISA ADP
Red Hat multicluster engine for Kubernetes 2.11 redhat:multicluster_engine	from 1786911952 not affected	CISA ADP
Red Hat OpenShift API for Data Protection 1.6 redhat:openshift_api_data_protection	from 1784058822 not affected	CISA ADP
1–10 of 60

References

References

https://go.dev/cl/761581	patch
https://go.dev/cl/761640	patch
https://go.dev/issue/78476	issue-tracking, mailing-list
https://groups.google.com/g/golang-announce/c/qcCIEXso47M	release-notes
https://pkg.go.dev/vuln/GO-2026-4918	vendor-advisory
https://access.redhat.com/errata/RHSA-2026:22112
https://access.redhat.com/errata/RHSA-2026:22120
https://access.redhat.com/errata/RHSA-2026:22121
https://access.redhat.com/errata/RHSA-2026:23262
https://access.redhat.com/errata/RHSA-2026:23264
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.