CVE-2026-44948 SUSE CVE debrief

Who should care

Rancher Fleet administrators and security teams should assess exposure and prioritize verification of vulnerable versions. Security teams should monitor for potential attacks and review compensating controls for exposed systems. Affected operator, platform, vulnerability-management, and security-team impact should be reviewed.

Why it matters

The path traversal vulnerability in Rancher Fleet's ImageScan subsystem requires verification of vulnerable versions and application of vendor-provided mitigation to prevent denial of service attacks.

• Denial of service attacks may occur if the vulnerability is exploited
• Rancher Fleet administrators need to verify vulnerable versions and apply mitigation
• Security teams should monitor for potential attacks

Technical summary

The vulnerability was found in the ImageScan subsystem of Rancher Fleet, which could allow an attacker to traverse outside of the intended directory, causing a denial of service. The affected versions are 0.12.0 up to 0.12.16, 0.13.0 up to 0.13.12, 0.14.0 up to 0.14.7 and 0.15.0 up to 0.15.3. The vulnerability requires verification of vulnerable versions and application of vendor-provided mitigation to prevent denial of service attacks. Security teams should assess exposure and prioritize verification of vulnerable versions.

Defensive priority

Rancher Fleet administrators should assess exposure and prioritize verification of vulnerable versions.

Recommended defensive actions

• Verify Rancher Fleet version and assess exposure
• Apply vendor-provided mitigation
• Monitor for potential denial of service attacks
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The vulnerability was found in the ImageScan subsystem of Rancher Fleet, which could allow an attacker to traverse outside of the intended directory, causing a denial of service. The affected versions are 0.12.0 up to 0.12.16, 0.13.0 up to 0.13.12, 0.14.0 up to 0.14.7 and 0.15.0 up to 0.15.3. Evidence is limited to vendor-provided advisory and CVE record. Defenders should verify vulnerable versions and apply mitigation.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.