# CVE-2025-23047: GO-2025-3416 - Cilium has an information leakage via insecure default Hubble UI CORS header in github.com/cilium/cilium

Source: https://junglewise.ai/threats/cve-2025-23047-cilium-has-an-information-leakage-via-insecure-default-hubble-ui  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-01-28  
License: CC BY 4.0 with a link back

CVE-2025-23047 · Severity: low · CVSS 3.1 · Published 2025-01-28

Cilium has an information leakage via insecure default Hubble UI CORS header in github.com/cilium/cilium

Technologies: [github.com/cilium/cilium (Go)](https://junglewise.ai/threats/technologies/github-com-cilium-cilium). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2025-23047 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-23047 being exploited in the wild.

**How severe is CVE-2025-23047?** Low severity, with a CVSS score of 3.1, published 28 January 2025.

**Which products and versions are affected?** github.com/cilium/cilium (Go) SEMVER:introduced=1.14.0,fixed=1.14.19, SEMVER:introduced=1.14.0,fixed=1.14.19,introduced=1.15.0,fixed=1.15.13,introduced=1.16.0,fixed=1.16.6.

**Is there a fix for CVE-2025-23047?** Yes. github.com/cilium/cilium (Go): upgrade to 1.14.19, 1.16.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-23047?** Check whether you run github.com/cilium/cilium (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/cilium/cilium (Go): upgrade to 1.14.19, 1.16.6 or later

  ```sh
  go get github.com/cilium/cilium@v1.16.6
  ```


## Affected products

- github.com/cilium/cilium (Go) SEMVER:introduced=1.14.0,fixed=1.14.19, SEMVER:introduced=1.14.0,fixed=1.14.19,introduced=1.15.0,fixed=1.15.13,introduced=1.16.0,fixed=1.16.6

## Identifiers

- CVE-2025-23047
- GHSA-h78m-j95m-5356
- GO-2025-3416

## Related threats

- [Cilium incorrect authorization in Kubernetes NetworkPolicy ipBlock rules](https://junglewise.ai/threats/cve-2026-56743-cilium-incorrect-authorization-in-kubernetes-networkpolicy)
- [Cilium authorization bypass in Gateway API HTTPRoute mirroring](https://junglewise.ai/threats/cve-2026-56742-cilium-authorization-bypass-in-gateway-api-httproute-mirroring)
- [Cilium world-accessible Envoy admin socket on cluster nodes](https://junglewise.ai/threats/cve-2026-49445-cilium-world-accessible-envoy-admin-socket-on-cluster-nodes)
- [Cilium traffic hijacking via CiliumLocalRedirectPolicy addressMatcher](https://junglewise.ai/threats/cve-2026-53935-cilium-traffic-hijacking-via-ciliumlocalredirectpolicy)
- [Cilium sensitive information disclosure in cilium-bugtool](https://junglewise.ai/threats/cve-2026-41520-cilium-sensitive-information-disclosure-in-cilium-bugtool)