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v15.5.27

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Next.js·Sep 30, 2026, 04:13 PMChangeSecurity-relevantAI-assisted summary

Summary

Fixed information disclosure via dynamicParams in App Router metadata image routes.
Patched cache poisoning vulnerabilities affecting SSG and ISR pages, preventing cross‑user content substitution.
Mitigated persistent denial‑of‑service risks caused by cache poisoning in self‑hosted Next.js applications.

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Official source Last checked Oct 5, 2026, 10:02 AM

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