# Cilium 1.18.15 releases with bugfixes and security updates

> **Key takeaway:** Cilium 1.18.15 addresses endpoint deletion bugs, ip6tables errors, and includes security updates for several dependencies.

**Published:** 2026-10-15T15:26:26+00:00 
**Source:** Cilium eBPF Cloud Native Networking 
**Category:** cloud-native 
**Canonical URL:** https://fosswire.org/news/cilium-11815-releases-with-bugfixes-and-security-updates.html 

## Summary
The Cilium 1.18.15 release provides critical bugfixes for eBPF-based cloud-native networking. Key improvements include fixing incorrect endpoint deletion during garbage collection, resolving silent ip6tables chain rename errors, and correcting backend quarantine issues during restarts. The update also includes security patches for golang.org/x/net and go.opentelemetry.io modules.

## Technical improvements in Cilium 1.18.15
- Fixed a bug where new endpoints were incorrectly deleted during **GC iteration** when reusing IDs from previously deleted endpoints.
- Resolved an issue where **ip6tables** chain rename errors were silently ignored during rule reconciliation.
- Fixed a logic error where terminating backends were incorrectly kept in **quarantine** if they became active again during a restart.
- Updated **etcd** and **x/crypto** module versions.
- Applied security updates to **golang.org/x/net** and **go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp**.

## Why it matters
This release improves the stability of Kubernetes networking environments by fixing edge cases in endpoint management and security patching critical dependencies.