Sceawere

Vulnerability Detail

CVE-2026-54548 Verified Sceawere Triage Sources: NVD / CISA KEV

Vulnerability Metadata

Severity
Low
Score / CVSS
3.3
Creation Date
4h ago
Vendor
siemens
Product
kas
Attack Type
CWE-295: Improper Certificate Validation
Vector String
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
Attack Complexity
HIGH

Narrative and Response

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.

Executive Summary

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Technical Details

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Mitigations

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References

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Additional Metadata

{
  "score": "3.3",
  "pubDate": "2026-08-26T15:16:49.070Z",
  "pubdate": "2026-08-26T15:16:49.070Z"
}