OCPBUGS-103964:[release-4.20] Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame

[Pranavgarud06]

Summary

1. Fixes CVE-2026-33814 (golang.org/x/net/http2 HTTP/2 client infinite-loop DoS on SETTINGS_MAX_FRAME_SIZE=0, GO-2026-4918, CVSS 7.5) on release-4.20
2. Uses go mod edit -replace to pin golang.org/x/net to github.com/openshift-sustaining/net@v0.50.0-sec.4 (keeps go 1.24.0; the upstream fix in x/net v0.53.0 would force go 1.25.0)
3. Ran go mod tidy, go mod vendor, and verified clean build with go build ./...

Test plan

• go build ./... passes locally
• govulncheck ./... no longer reports GO-2026-4918
• CI passes

🤖 Generated with Claude Code

[openshift-merge-bot]

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[openshift-ci-robot]

@Pranavgarud06: This pull request references Jira Issue OCPBUGS-103964, which is invalid:

• expected Jira Issue OCPBUGS-103964 to depend on a bug targeting a version in 4.21.0, 4.21.z and in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but no dependents were found

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

Details

In response to this:

Summary

1. Fixes CVE-2026-33814 (golang.org/x/net/http2 HTTP/2 client infinite-loop DoS on SETTINGS_MAX_FRAME_SIZE=0, GO-2026-4918, CVSS 7.5) on release-4.20
2. Uses go mod edit -replace to pin golang.org/x/net to github.com/openshift-sustaining/net@v0.50.0-sec.4 (keeps go 1.24.0; the upstream fix in x/net v0.53.0 would force go 1.25.0)
3. Ran go mod tidy, go mod vendor, and verified clean build with go build ./...

Test plan

• go build ./... passes locally
• govulncheck ./... no longer reports GO-2026-4918
• CI passes

🤖 Generated with Claude Code

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Pranavgarud06
Once this PR has been reviewed and has the lgtm label, please assign ardaguclu for approval. For more information see the Code Review Process.

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[openshift-ci]

@Pranavgarud06: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/security	1b648c6	link	false	/test security

Full PR test history. Your PR dashboard.

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