CVE-2026-54548

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Source
https://cve.org/CVERecord?id=CVE-2026-54548
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54548.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54548
Aliases
Downstream
Published
2026-08-26T14:17:32Z
Modified
2026-10-28T02:31:14Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N CVSS Calculator
Summary
kas: Persistent SSH Host Key Checking Disablement
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.

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"
}
References

Affected packages

Git / github.com/siemens/kas

Affected ranges

Type
GIT
Repo
https://github.com/siemens/kas
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
81bab5294be29de4b64adedce962d36184bfc66f
Fixed
1c1e861c9f241ce082b86bef6bedc7da9b676294
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "5.4"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "1c1e861c9f241ce082b86bef6bedc7da9b676294"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "5.4",
            "range":  [
                {
                    "fixed":  "81bab5294be29de4b64adedce962d36184bfc66f"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

0.*
0.10.0
0.11.0
0.12.0
0.13.0
0.14.0
0.15.0
0.16.0
0.16.1
0.17.0
0.18.0
0.19.0
0.20.0
0.20.1
0.9.0
1.*
1.0
1.1
2.*
2.0
2.1
2.1.1
2.2
2.3
2.3.1
2.3.2
2.3.3
2.4
2.5
2.6
2.6.1
2.6.2
2.6.3
3.*
3.0
3.0.1
3.0.2
3.1
3.2
3.2.1
3.2.2
3.2.3
3.3
4.*
4.0
4.1
4.2
4.3
4.3.1
4.3.2
4.4
4.5
4.6
4.7
4.8
4.8.1
4.8.2
5.*
5.0
5.1
5.2
5.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54548.json"