[v1.13] Backport CVE-2025-13888: fix CVE namespace-isolation break (#897)

[vulgraph]

Backport of upstream fix for CVE-2025-13888 to v1.13.

• Upstream commit: bc6ac3e03d — fix CVE namespace-isolation break (cherrypick fix CVE namespace-isolation break #897)
• Cherry-picked with git cherry-pick -x (original author preserved).

Apply was clean against the current tip of the target branch. No code changes on top of the upstream fix.

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[openshift-ci]

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[openshift-ci]

Hi @vulgraph. Thanks for your PR.

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