{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1c1e861c9f241ce082b86bef6bedc7da9b676294"
            },
            {
              "fixed": "81bab5294be29de4b64adedce962d36184bfc66f"
            }
          ],
          "repo": "https://github.com/siemens/kas",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mv8m-v9v6-5f94"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-295"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54548.json"
  },
  "details": "kas is a setup tool for bitbake based projects. Prior to 5.4, internal SSH key setup triggered by SSH_PRIVATE_KEY or SSH_PRIVATE_KEY_FILE creates ~/.ssh/config when no user-specific SSH configuration exists and adds a global Host * rule containing StrictHostKeyChecking no. In kas/libcmds.py, ssh_no_host_key_check() runs without checking ctx.managed_env, so the setting persists after kas exits and affects future SSH sessions by the same local user, extending beyond the intended short-lived continuous integration environment. A later SSH connection can therefore accept an attacker-controlled host key without verification, increasing the risk of a man-in-the-middle attack that compromises session confidentiality or integrity. This issue is fixed in version 5.4.",
  "id": "CVE-2026-54548",
  "modified": "2026-08-28T11:30:31.209177318Z",
  "published": "2026-08-26T14:17:32.620Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siemens/kas/releases/tag/5.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54548.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/siemens/kas/security/advisories/GHSA-mv8m-v9v6-5f94"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54548"
    },
    {
      "type": "FIX",
      "url": "https://github.com/siemens/kas/commit/1c1e861c9f241ce082b86bef6bedc7da9b676294"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kas: Persistent SSH Host Key Checking Disablement"
}