[release-4.21] OCPBUGS-85621: fix CVE-2026-33186 by updating grpc-go

[jparrill]

Summary

• Fix CVE-2026-33186 by updating google.golang.org/grpc from v1.73.0 to v1.75.1 in go.mod and from v1.75.0 to v1.75.1 in hack/tools/go.mod

CVE Details

CVE-2026-33186 — Authorization bypass in gRPC-Go server via malformed :path headers.

Malformed :path headers (missing the leading slash) could bypass path-based "deny" rules in interceptors like grpc/authz. The patch enforces strict path checking for incoming requests on the server, rejecting any request with a non-canonical path with an Unimplemented error.

Links

• Jira: OCPBUGS-85621
• GitHub Advisory: GHSA-p77j-4mvh-x3m3
• Upstream fix: grpc/grpc-go@72186f1

Test plan

• make update passes
• CI passes

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Repository: openshift/coderabbit/.coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 6a33d632-3e6c-4c97-b220-42e26139a360

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[openshift-ci-robot]

@jparrill: This pull request references Jira Issue OCPBUGS-85621, which is invalid:

• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.
• expected dependent Jira Issue OCPBUGS-83972 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is Closed (Not a Bug) instead
• expected dependent Jira Issue OCPBUGS-83972 to target a version in 4.22.0, but it targets "4.22.z" instead

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

• Fix CVE-2026-33186 by updating google.golang.org/grpc from v1.73.0 to v1.75.1 in go.mod and from v1.75.0 to v1.75.1 in hack/tools/go.mod

CVE Details

CVE-2026-33186 — Authorization bypass in gRPC-Go server via malformed :path headers.

Malformed :path headers (missing the leading slash) could bypass path-based "deny" rules in interceptors like grpc/authz. The patch enforces strict path checking for incoming requests on the server, rejecting any request with a non-canonical path with an Unimplemented error.

Links

• Jira: OCPBUGS-85621
• GitHub Advisory: GHSA-p77j-4mvh-x3m3
• Upstream fix: grpc/grpc-go@72186f1

Test plan

• make update passes
• CI passes

🤖 Generated with Claude Code

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jparrill

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [jparrill]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[jparrill]

/jira refresh

[openshift-ci-robot]

@jparrill: This pull request references Jira Issue OCPBUGS-85621, which is invalid:

• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.
• expected dependent Jira Issue OCPBUGS-83972 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is Closed (Not a Bug) instead
• expected dependent Jira Issue OCPBUGS-83972 to target a version in 4.22.0, but it targets "4.22.z" instead

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.

Details

In response to this:

/jira refresh

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[bryan-cox]

/lgtm

[jparrill]

/jira refresh

[openshift-ci-robot]

@jparrill: This pull request references Jira Issue OCPBUGS-85621, which is invalid:

• expected dependent Jira Issue OCPBUGS-83972 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is Closed (Not a Bug) instead

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.

Details

In response to this:

/jira refresh

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[jparrill]

/jira refresh

[openshift-ci-robot]

@jparrill: This pull request references Jira Issue OCPBUGS-85621, which is valid. The bug has been moved to the POST state.

7 validation(s) were run on this bug

• bug is open, matching expected state (open)
• bug target version (4.21.z) matches configured target version for branch (4.21.z)
• bug is in the state ASSIGNED, which is one of the valid states (NEW, ASSIGNED, POST)
• release note text is set and does not match the template
• dependent bug Jira Issue OCPBUGS-83972 is in the state Closed (Done), which is one of the valid states (VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA))
• dependent Jira Issue OCPBUGS-83972 targets the "4.22.0" version, which is one of the valid target versions: 4.22.0
• bug has dependents

No GitHub users were found matching the public email listed for the QA contact in Jira (ocp-sustaining-admins@redhat.com), skipping review request.

Details

In response to this:

/jira refresh

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[jparrill]

/retest-required

[openshift-ci]

@jparrill: all tests passed!

Full PR test history. Your PR dashboard.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[jparrill]

/verified by e2e

[openshift-ci-robot]

@jparrill: This PR has been marked as verified by e2e.

Details

In response to this:

/verified by e2e

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci-robot]

@jparrill: Jira Issue OCPBUGS-85621: Some pull requests linked via external trackers have merged:

The following pull request, linked via external tracker, has not merged:

• openshift/hypershift#8512 is open

All associated pull requests must be merged or unlinked from the Jira bug in order for it to move to the next state. Once unlinked, request a bug refresh with /jira refresh.

Jira Issue OCPBUGS-85621 has not been moved to the MODIFIED state.

This PR is marked as verified. If the remaining PRs listed above are marked as verified before merging, the issue will automatically be moved to VERIFIED after all of the changes from the PRs are available in an accepted nightly payload.

Details

In response to this:

Summary

• Fix CVE-2026-33186 by updating google.golang.org/grpc from v1.73.0 to v1.75.1 in go.mod and from v1.75.0 to v1.75.1 in hack/tools/go.mod

CVE Details

CVE-2026-33186 — Authorization bypass in gRPC-Go server via malformed :path headers.

Malformed :path headers (missing the leading slash) could bypass path-based "deny" rules in interceptors like grpc/authz. The patch enforces strict path checking for incoming requests on the server, rejecting any request with a non-canonical path with an Unimplemented error.

Links

• Jira: OCPBUGS-85621
• GitHub Advisory: GHSA-p77j-4mvh-x3m3
• Upstream fix: grpc/grpc-go@72186f1

Test plan

• make update passes
• CI passes

🤖 Generated with Claude Code

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[jparrill]

/jira refresh

[openshift-ci-robot]

@jparrill: Jira Issue Verification Checks: Jira Issue OCPBUGS-85621
✔️ This pull request was pre-merge verified.
✔️ All associated pull requests have merged.
✔️ All associated, merged pull requests were pre-merge verified.

Jira Issue OCPBUGS-85621 has been moved to the MODIFIED state and will move to the VERIFIED state when the change is available in an accepted nightly payload. 🕓

Details

In response to this:

/jira refresh

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.