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  5. CVE-2025-23047

CVE-2025-23047: Cilium has an information leakage via insecure default Hubble UI CORS header

January 22, 2025

For users who deploy Hubble UI using either Cilium CLI or via the Cilium Helm chart, an insecure default Access-Control-Allow-Origin header value could lead to sensitive data exposure. A user with access to a Hubble UI instance affected by this issue could leak configuration details about the Kubernetes cluster which Hubble UI is monitoring, including node names, IP addresses, and other metadata about workloads and the cluster networking configuration. In order for this vulnerability to be exploited, a victim would have to first visit a malicious page.

References

  • github.com/advisories/GHSA-h78m-j95m-5356
  • github.com/cilium/cilium
  • github.com/cilium/cilium/commit/a3489f190ba6e87b5336ee685fb6c80b1270d06d
  • github.com/cilium/cilium/security/advisories/GHSA-h78m-j95m-5356
  • nvd.nist.gov/vuln/detail/CVE-2025-23047

Code Behaviors & Features

Detect and mitigate CVE-2025-23047 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions starting from 1.14.0 before 1.14.19, all versions starting from 1.15.0 before 1.15.13, all versions starting from 1.16.0 before 1.16.6

Fixed versions

  • 1.14.19
  • 1.15.13
  • 1.16.6

Solution

Upgrade to versions 1.14.19, 1.15.13, 1.16.6 or above.

Impact 6.5 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Source file

go/github.com/cilium/cilium/CVE-2025-23047.yml

Spotted a mistake? Edit the file on GitLab.

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