fix(deps): update undici to 6.26.0 and 7.28.0

[albarbaro]

Description

Update undici to 6.26.0 and 7.28.0 to fix CVE-2026-12151 CVE-2026-9697 CVE-2026-6734

• Updates undici in packages/backend/package.json
• Run yarn up -R undici

Which issue(s) does this PR fix

• Fixes https://redhat.atlassian.net/browse/RHIDP-14921 https://redhat.atlassian.net/browse/RHIDP-14919 https://redhat.atlassian.net/browse/RHIDP-14918

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

[github-actions]

Image was built and published successfully. It is available at:

• quay.io/rhdh-community/rhdh:pr-4982
• quay.io/rhdh-community/rhdh:pr-4982-55eeb45d

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Omar-AlJaljuli]

/lgtm

[github-actions]

Image was built and published successfully. It is available at:

• quay.io/rhdh-community/rhdh:pr-4982
• quay.io/rhdh-community/rhdh:pr-4982-d1f2a5ec

[albarbaro]

/retest

[albarbaro]

/retest

[albarbaro]

/retest

[openshift-ci]

@albarbaro: 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/e2e-ocp-helm	d1f2a5e	link	true	/test e2e-ocp-helm

Full PR test history. Your PR dashboard.

Details

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