- Deprecate Marshal.load on raw cache reads in RedisCacheStore and avoid it in MemCacheStore to address CVE‑2020‑8165.
- Add same‑origin check before embedding CSRF token in XHRs (CVE‑2020‑8167), HMAC raw CSRF token before masking (CVE‑2020‑8166), and return self for each/each_pair/each_value in Action Pack (CVE‑2020‑8164).
- Include Content‑Length in the signature for ActiveStorage direct uploads (CVE‑2020‑8162).
5.2.4.3
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