CVE-2026-112000: Auth Bypass (CVSS 7.6)

Description

Vanus 0.8.0 through 0.9.0 contains a missing authorization vulnerability in the gateway that allows any authenticated user to call Subscribe, Ack, and unregistered methods without permission checks. Attackers can supply another tenant's subscription ID to Subscribe to hijack it, read and acknowledge its events, starve the legitimate consumer, and enumerate cluster users via ListUser.

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CVSS v3.1 Score

7.6

HIGH

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

EPSS — Exploit Prediction

0.0029

Probability of exploitation

0.22%

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-862 Missing Authorization

References

Other References

https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/gateway/auth/auth.go#L97-L110 https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/gateway/auth/interceptor.go#L35-L40 https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/gateway/proxy/proxy.go#L256-L300 https://github.com/vanus-labs/vanus/issues/647 https://www.vulncheck.com/advisories/vanus-0.8.0-through-0.9.0-missing-authorization-in-gateway-streaming-rpcs

Frequently Asked Questions

What is CVE-2026-112000? +

Vanus 0.8.0 through 0.9.0 contains a missing authorization vulnerability in the gateway that allows any authenticated user to call Subscribe, Ack, and unregistered methods without permission checks. Attackers can supply another tenant's subscription ID to Subscribe to hijack it, read and acknowledge its events, starve the legitimate consumer, and enumerate cluster users via ListUser. It has a CVSS v3.1 base score of 7.6 (HIGH).

How severe is CVE-2026-112000? +

CVE-2026-112000 has a CVSS v3.1 score of 7.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0029, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-112000? +

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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