{"cve":"CVE-2016-10931","nvd":{"published":"2019-08-26T12:15:11.327","modified":"2026-06-17T00:40:38.780","status":"Modified","description":"An issue was discovered in the openssl crate before 0.9.0 for Rust. There is an SSL/TLS man-in-the-middle vulnerability because certificate verification is off by default and there is no API for hostname verification.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-295"],"references":["https://rustsec.org/advisories/RUSTSEC-2016-0001.html","https://rustsec.org/advisories/RUSTSEC-2016-0001.html"],"products":["rust-openssl_project:rust-openssl"],"source":"nvd","synced_at":"2026-10-19T20:58:39.700375520+00:00"},"epss":{"cve":"CVE-2016-10931","score":0.00745,"percentile":0.54788,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-34p9-f4q3-c4r7","url":"https://osv.dev/vulnerability/GHSA-34p9-f4q3-c4r7","summary":"Improper Certificate Validation in openssl","modified":"2023-11-08T03:58:21.575910Z","packages":[{"ecosystem":"crates.io","name":"openssl","purl":"pkg:cargo/openssl","ranges":["<0.9.0"],"fixed":["0.9.0"]}]},{"id":"RUSTSEC-2016-0001","url":"https://osv.dev/vulnerability/RUSTSEC-2016-0001","summary":"SSL/TLS MitM vulnerability due to insecure defaults","modified":"2026-02-04T04:25:11.291505Z","packages":[{"ecosystem":"crates.io","name":"openssl","purl":"pkg:cargo/openssl","ranges":[">=0.0.0-0 <0.9.0"],"fixed":["0.9.0"]}]}],"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."]}