onyx

onyx --cves cve-2020-8165

CVE-2020-8165

score
<0.1
cvss
9.8
epss
45.7%
published
2020-06-19
kev added
—
first seen

Rails < 5.2.4.3, Rails < 6.0.3.1 contain a deserialization of untrusted data caused by unmarshalling user-provided objects in MemCacheStore and RedisCacheStore, letting attackers execute arbitrary code, exploit requires attacker to control cache data.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2020-06-19 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 45.7%2026-09-23: epss 45.7%2026-09-24: epss 45.7%2026-09-25: epss 45.7%2026-09-26: epss 45.7%2026-09-27: epss 45.7%2026-09-28: epss 45.7%2026-09-29: epss 45.7%2026-09-30: epss 45.7%2026-10-01: epss 45.7%2026-10-02: epss 45.7%2026-10-03: epss 45.7%2026-10-04: epss 45.7%2026-10-05: epss 45.7%2026-10-06: epss 45.7%2026-10-07: epss 45.7%2026-10-08: epss 45.7%2026-10-09: epss 45.7%2026-10-10: epss 45.7%2026-10-11: epss 45.7%2026-10-12: epss 45.7%2026-10-13: epss 45.7%2026-10-14: epss 45.7%2026-10-15: epss 45.7%2026-10-16: epss 45.7%2026-10-18: epss 45.7%2026-10-19: epss 45.7%2026-10-20: epss 45.7%2026-10-21: epss 45.7%45.7%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx
  3. Public PoC

Exploit availability

Public PoC flagged by vulnx; no direct exploit link among the citations.

Weaknesses

CWE-502

References 9