{"id":"CVE-2026-45695","aliases":["GHSA-2q4c-3mrw-63c3","GO-2026-5009"],"url":"https://o3.security/vulnerability/CVE-2026-45695","summary":"Kopia: Unauthenticated RCE via SSH ProxyCommand Injection when --insecure --without-password is used","details":"Kopia is a cross-platform backup tool for Windows, macOS, and Linux with fast incremental backups, client-side end-to-end encryption, compression, and data deduplication. Prior to 0.23.0, Kopia's HTTP server started with --without-password accepts unauthenticated requests to /api/v1/repo/exists and forwards attacker-supplied SFTP storage configuration to blob.NewStorage, where externalSSH: true and sshArguments containing -oProxyCommand=<cmd> can cause exec.CommandContext(\"ssh\") to invoke the command through OpenSSH. This issue is fixed in version 0.23.0.","published":"2026-07-16T15:42:31.795Z","modified":"2026-08-12T03:51:42.148226348Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00348,"percentile":0.27864,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/kopia/kopia","fixedVersion":"0.23.0"}],"fix":{"url":"https://github.com/kopia/kopia/commit/c26c6a1b9734c5089217986ffa5cd19f8a6b8900","label":"kopia/kopia@c26c6a1"},"references":[{"type":"WEB","url":"https://github.com/kopia/kopia/releases/tag/v0.23.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45695.json"},{"type":"ADVISORY","url":"https://github.com/kopia/kopia/security/advisories/GHSA-2q4c-3mrw-63c3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45695"},{"type":"FIX","url":"https://github.com/kopia/kopia/commit/c26c6a1b9734c5089217986ffa5cd19f8a6b8900"},{"type":"FIX","url":"https://github.com/kopia/kopia/pull/5354"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.148226348Z"}}