{"cve":"CVE-2020-8165","nvd":{"published":"2020-06-19T18:15:11.067","modified":"2026-06-17T03:25:58.407","status":"Modified","description":"A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-502"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html","http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html","https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c","https://hackerone.com/reports/413388","https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html"],"products":["debian:debian_linux","opensuse:leap","rubyonrails:rails"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-8165","score":0.45732,"percentile":0.98799,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2p68-f74v-9wc6","url":"https://osv.dev/vulnerability/GHSA-2p68-f74v-9wc6","summary":"ActiveSupport potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore","modified":"2025-05-09T22:03:05.053764Z","packages":[{"ecosystem":"RubyGems","name":"activesupport","purl":"pkg:gem/activesupport","ranges":[">=5.0.0 <5.2.4.3"],"fixed":["5.2.4.3"]},{"ecosystem":"RubyGems","name":"activesupport","purl":"pkg:gem/activesupport","ranges":[">=6.0.0 <6.0.3.1"],"fixed":["6.0.3.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}