- CSV export API now includes a header row (and VMUI no longer adds its own), which may require script adjustments; a related bug in open‑telemetry unit handling is also fixed.
- Security: upgrade of the Go builder from 1.26.1 to 1.26.2.
- Multiple new features: remoteWrite.disableMetadata flag, EC2 profile support, filestream fsync metrics, vmctl Thanos migration mode, extensive vmalert monitoring improvements, OS info metric, and various per‑component enhancements.
v1.140.0
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Enable multitenancy via headers by default for vmselect, vminsert and vmagent (default flag changed to true), which may break existing URL patterns.
Upgrade Go builder to Go1.26.6, addressing security issues in the runtime.
Upgrade Go builder from 1.26.5 to 1.26.6 for security patches.