Is github.com/kumahq/kuma affected by CVE-2026-45021?

Go github.com/kumahq/kuma is affected in =2.9.0 =2.11.0 =2.12.0 =2.13.0 <2.13.5.

Is CVE-2026-45021 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

medium

CVE-2026-45021

Q: Is CVE-2026-45021 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

Go · github.com/kumahq/kuma

Summary

Default kuma-cp leaks admin token cross-origin via CORS wildcard + LocalhostIsAdmin

Severity: medium
EPSS: 0.2% (p10)
Also known as: GHSA-3vcp-chfh-f6r2
Published: 2026-05-14

References

https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2
https://nvd.nist.gov/vuln/detail/CVE-2026-45021
https://github.com/kumahq/kuma/pull/16416

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.