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NVD / CVE Program· CNA redhat

CVE-2026-89060: Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.47% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: github.com/stolostron/multicluster-observability-addon multicluster-observability-addon 1f727af81d89c50c76d4db1f6ece7db39653006d, 683191e26a0ecb1a36d3e58470f1c1bed1ba62d4, 691eb796f04e358adeae441b453dbfdc576ff7fe.

Low priority for now. Upgrade to github.com/stolostron/multicluster-observability-addon multicluster-observability-addon 1f727af81d89c50c76d4db1f6ece7db39653006d, 683191e26a0ecb1a36d3e58470f1c1bed1ba62d4, 691eb796f04e358adeae441b453dbfdc576ff7fe or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A cross-namespace authorization flaw in multicluster-observability-addon allows a user with permission to modify a managed cluster’s ManagedClusterAddOn configuration to reference ClusterLogForwarder or OpenTelemetryCollector resources outside the permitted namespace. If those resources reference Secrets, the add-on may copy the referenced Secrets to the attacker-controlled managed cluster.

HighCVSS 7.7 · v3.1—No exploit Fix available
Published
Sep 11, 2026
Updated
Sep 21, 2026
EPSS
0.4% · 41th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.7
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-89060

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • github.com/stolostron/multicluster-observability-addon multicluster-observability-addon

    • all versionsaffected · gitfixed in ad36a3ba9fd946c04de71621e47486f7aa2634fd, 683191e26a0ecb1a36d3e58470f1c1bed1ba62d4, 8139c3ac7d388e0b3b008d1fb7d9bbdfabe252bb, 691eb796f04e358adeae441b453dbfdc576ff7fe, 1f727af81d89c50c76d4db1f6ece7db39653006d

  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13

    • 1789126264 and laternot affected · rpm

  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14

    • 1789126262 and laternot affected · rpm

  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15

    • 1789126262 and laternot affected · rpm

  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16

    • 1789126267 and laternot affected · rpm

  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17

    • 1789126264 and laternot affected · rpm

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
github.com/stolostron/multicluster-observability-addon multicluster-observability-addon1f727af81d89c50c76d4db1f6ece7db39653006dVendor (CNA)
github.com/stolostron/multicluster-observability-addon multicluster-observability-addon683191e26a0ecb1a36d3e58470f1c1bed1ba62d4Vendor (CNA)
github.com/stolostron/multicluster-observability-addon multicluster-observability-addon691eb796f04e358adeae441b453dbfdc576ff7feVendor (CNA)
github.com/stolostron/multicluster-observability-addon multicluster-observability-addon8139c3ac7d388e0b3b008d1fb7d9bbdfabe252bbVendor (CNA)
github.com/stolostron/multicluster-observability-addon multicluster-observability-addonad36a3ba9fd946c04de71621e47486f7aa2634fdVendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-551 · Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records