{"cve":"CVE-2026-59846","nvd":{"published":"2026-07-21T13:17:18.143","modified":"2026-09-01T21:18:34.740","status":"Modified","description":"A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","score":3.9},"cwes":["CWE-78","CWE-77"],"references":["https://access.redhat.com/errata/RHSA-2026:42922","https://access.redhat.com/errata/RHSA-2026:55855","https://access.redhat.com/errata/RHSA-2026:62217","https://access.redhat.com/errata/RHSA-2026:62218","https://access.redhat.com/security/cve/CVE-2026-59846"],"products":["libssh:libssh","redhat:enterprise_linux","redhat:hardened_images"],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-59846","score":0.0012,"percentile":0.01802,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}