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HIGH

CVE-2026-33814

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

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.

Published Updated Sources: cvelistV5, Go

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Unreported

no source claims exploitation

EPSS

1%

chance of exploitation in 30 days

Affects

golang org x net

107 products listed

CVSS base

7.5

HIGH

CISA SSVC assessment

Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.

CISA

Exploitation

None

none · proof-of-concept · active

Automatable

Yes

can an attacker script all four kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Affected scope

The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.

Products (107)

golang org x net http2net httpred hat enterprise linux 10red hat enterprise linux 10 0 extended update supportred hat enterprise linux 8red hat enterprise linux 9red hat enterprise linux 9 2 update services for sap solutionsred hat enterprise linux 9 4 update services for sap solutionsred hat enterprise linux 9 6 extended update supportred hat openshift container platform 4 16red hat openshift container platform 4 19red hat openshift container platform 4 20red hat openshift container platform 4 21red hat openshift container platform 4 22cluster observability operator 1 5 0multicluster engine for kubernetes 2 11openshift api for data protection 1 6red hat advanced cluster management for kubernetes 2 16red hat hardened imagesred hat openshift ai 2 25red hat openshift ai 3 4red hat openshift container platform 4 12red hat openshift container platform 4 14red hat openshift container platform 4 15red hat openshift container platform 4 17red hat openshift data foundation 4 22red hat openshift distributed tracing 3 10 2red hat openshift service mesh 3 0red hat openshift service mesh 3 1red hat openshift service mesh 3 2red hat openshift service mesh 3 3red hat openshift workload availability 0 12red hat openshift workload availability 0 13red hat openshift workload availability 0 3red hat openshift workload availability 0 7red hat openshift workload availability 0 8red hat openshift workload availability 5 7assisted installer for red hat openshift container platform 2builds for red hat openshiftcert manager operator for red hat openshiftcompliance operatorconfidential compute attestationcryostat 4custom metric autoscaler operator for red hat openshiftdeployment validation operatorexternaldns operatorexternal secrets operator for red hat openshiftfence agents remediation operatorfile integrity operatorgatekeeper 3logging subsystem for red hat openshiftlogical volume manager storagemachine deletion remediation operatormigration toolkit for applications 8migration toolkit for containersmultiarch tuning operatormulticluster engine for kubernetesmulticluster global hubnetwork observability operatornode healthcheck operatoropenshift api for data protectionopenshift developer tools and servicesopenshift lightspeedopenshift pipelinesopenshift serverlessopenshift service mesh 2openshift service mesh 3power monitoring for red hat openshiftred hat 3scale api management platform 2red hat advanced cluster management for kubernetes 2red hat advanced cluster security 4red hat ansible automation platform 2red hat ceph storage 5red hat ceph storage 6red hat ceph storage 7red hat ceph storage 8red hat ceph storage 9red hat certification program for red hat enterprise linux 9red hat connectivity link 1red hat developer hubred hat edge manager 1red hat enterprise linux 7red hat enterprise linux ai rhel ai 3red hat lightspeed for runtimes operatorred hat openshift ai rhoaired hat openshift cluster manager clired hat openshift container platform 4red hat openshift data foundation 4red hat openshift dev spacesred hat openshift dev workspaces operatorred hat openshift distributed tracing 3red hat openshift for windows containersred hat openshift gitopsred hat openshift on awsred hat openshift virtualization 4red hat openstack platform 16 2red hat openstack platform 17 1red hat openstack platform 18 0red hat quay 3red hat satellite 6red hat service interconnect 2red hat trusted artifact signerred hat web terminalsecrets management console for red hat openshiftsecurity profiles operatorzero trust workload identity managerzero trust workload identity manager tech preview

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactSource
7.5CVSS 3.1HIGH——cvelistV5

Weakness & attack patterns

  • CWE-606

Detection

Read off the CVSS vector and the weakness class. Starting points, not rules we have tested.

  • Search application, proxy, and WAF logs for requests touching /2.

References

25 on the record

Elsewhere on this site

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.