{"cve":"CVE-2026-54548","nvd":{"published":"2026-08-26T15:16:49.070","modified":"2026-09-09T21:09:13.080","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","score":3.3},"cwes":["CWE-295"],"references":["https://github.com/siemens/kas/commit/1c1e861c9f241ce082b86bef6bedc7da9b676294","https://github.com/siemens/kas/releases/tag/5.4","https://github.com/siemens/kas/security/advisories/GHSA-mv8m-v9v6-5f94"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-54548","score":0.00112,"percentile":0.01371,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mv8m-v9v6-5f94","url":"https://osv.dev/vulnerability/GHSA-mv8m-v9v6-5f94","summary":"kas Persistently Disables SSH Host Key Checking","modified":"2026-09-10T12:26:04.299533377Z","packages":[{"ecosystem":"PyPI","name":"kas","purl":"pkg:pypi/kas","ranges":["<5.4"],"fixed":["5.4"]}]},{"id":"PYSEC-2026-3855","url":"https://osv.dev/vulnerability/PYSEC-2026-3855","summary":"kas Persistently Disables SSH Host Key Checking","modified":"2026-09-10T12:15:09.150199176Z","packages":[{"ecosystem":"PyPI","name":"kas","purl":"pkg:pypi/kas","ranges":["<5.4"],"fixed":["5.4"]}]}],"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."]}