CTI · reviewed · 2026-10-06

A wake-up call at the right time: The XZ Utils Backdoor. At the end of March 2024, the tech world held its collective breath. A Microsoft developer discovered malicious code in XZ Utils that could have enabled an SSH backdoor through liblzma.

Full story & timeline

MITRE ATT&CK

• T1195 Supply Chain Compromise Initial Access

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://dev.to/nova-reik/xz-utils-backdoor-die-lehren-aus-dem-beinahe-gau-fur-open-source-4gfi
• https://cvedatabase.com/blog/the-invisible-threat-a-deep-dive-analysis-of-software-supply-chain-attacks-2026-09-30