Is activesupport affected by CVE-2020-8165?

RubyGems activesupport is affected in >=5.0.0 =6.0.0 <6.0.3.1.

Is CVE-2020-8165 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 45.7%.

critical

CVE-2020-8165

Q: Is CVE-2020-8165 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 45.7%.

RubyGems · activesupport

Summary

ActiveSupport potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore

Severity: critical
EPSS: 45.7% (p99)
Also known as: GHSA-2p68-f74v-9wc6
Published: 2020-05-26

References

https://nvd.nist.gov/vuln/detail/CVE-2020-8165
https://hackerone.com/reports/413388
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2020-8165.yml

Related advisories

CVE-2026-33176 — medium · RubyGems/activesupport
CVE-2026-33170 — medium · RubyGems/activesupport
CVE-2026-33169 — medium · RubyGems/activesupport
CVE-2023-38037 — medium · RubyGems/activesupport
CVE-2023-28120 — medium · RubyGems/activesupport

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.