{"cve":"CVE-2020-17516","nvd":{"published":"2021-02-03T17:15:13.123","modified":"2026-06-17T02:59:03.453","status":"Modified","description":"Apache Cassandra versions 2.1.0 to 2.1.22, 2.2.0 to 2.2.19, 3.0.0 to 3.0.23, and 3.11.0 to 3.11.9, when using 'dc' or 'rack' internode_encryption setting, allows both encrypted and unencrypted internode connections. A misconfigured node or a malicious user can use the unencrypted connection despite not being in the same rack or dc, and bypass mutual TLS requirement.","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:N/A:N","score":7.5},"cwes":["CWE-290"],"references":["http://mail-archives.apache.org/mod_mbox/cassandra-user/202102.mbox/%3c6E4340A5-D7BE-4D33-9EC5-3B505A626D8D%40apache.org%3e","https://lists.apache.org/thread.html/r81243a412a37a22211754936a13856af07cc68a93d728c52807486e9%40%3Ccommits.cassandra.apache.org%3E","https://lists.apache.org/thread.html/rcb16f36cafa184dd159e94033f87d0fc274c4752d467f3a09f2ceae4%40%3Ccommits.cassandra.apache.org%3E","https://lists.apache.org/thread.html/rd84bec24907617bdb72f7ec907cd7437a0fd5a8886eb55aa84dd1eb8%40%3Ccommits.cassandra.apache.org%3E","https://security.netapp.com/advisory/ntap-20210521-0002/"],"products":["apache:cassandra"],"source":"nvd","synced_at":"2026-10-19T21:14:10.479542811+00:00"},"epss":{"cve":"CVE-2020-17516","score":0.01955,"percentile":0.80267,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2vxm-vp4c-fjfw","url":"https://osv.dev/vulnerability/GHSA-2vxm-vp4c-fjfw","summary":"Authentication Bypass in Apache Cassandra","modified":"2024-02-17T05:34:23.508577Z","packages":[{"ecosystem":"Maven","name":"org.apache.cassandra:cassandra-all","purl":"pkg:maven/org.apache.cassandra/cassandra-all","ranges":[">=2.1.0 <3.0.24"],"fixed":["3.0.24"]},{"ecosystem":"Maven","name":"org.apache.cassandra:cassandra-all","purl":"pkg:maven/org.apache.cassandra/cassandra-all","ranges":[">=3.11.0 <3.11.10"],"fixed":["3.11.10"]}]}],"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."]}