CVE-2026-111998 (CVSS 9.8)

Description

Vanus 0.8.0 through 0.9.0 contains a default credentials vulnerability that allows unauthenticated remote attackers to gain cluster-admin access by using the hardcoded admin token. Attackers can send the fixed Bearer token to the gateway gRPC proxy port to manage namespaces, eventbuses, users, tokens, and role bindings, and read or publish events.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0069

Probability of exploitation

0.53%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1392 CWE-1392

References

Other References

https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/controller/tenant/controller.go#L449-L500 https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/primitive/constants.go#L37 https://github.com/vanus-labs/vanus/issues/647 https://www.vulncheck.com/advisories/vanus-0.8.0-through-0.9.0-default-admin-credentials-via-gateway https://github.com/vanus-labs/vanus/issues/647

Frequently Asked Questions

What is CVE-2026-111998? +

Vanus 0.8.0 through 0.9.0 contains a default credentials vulnerability that allows unauthenticated remote attackers to gain cluster-admin access by using the hardcoded admin token. Attackers can send the fixed Bearer token to the gateway gRPC proxy port to manage namespaces, eventbuses, users, tokens, and role bindings, and read or publish events. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-111998? +

CVE-2026-111998 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0069, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-111998? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-111998