Is github.com/oauth2-proxy/oauth2-proxy/v7 affected by CVE-2026-40574?

Go github.com/oauth2-proxy/oauth2-proxy/v7 is affected in <7.15.2.

Is CVE-2026-40574 being exploited?

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

medium

CVE-2026-40574

Q: Is CVE-2026-40574 being exploited?

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

Go · github.com/oauth2-proxy/oauth2-proxy/v7

Summary

OAuth2 Proxy has an Authorization Bypass in Email Domain Validation via Malformed Multi-@ Email Claims

Severity: medium
EPSS: 0.2% (p11)
Also known as: GHSA-c5c4-8r6x-56w3, BIT-oauth2-proxy-2026-40574
Published: 2026-04-15

References

https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-c5c4-8r6x-56w3
https://nvd.nist.gov/vuln/detail/CVE-2026-40574
https://github.com/oauth2-proxy/oauth2-proxy

Related advisories

CVE-2026-40575 — critical · Go/github.com/oauth2-proxy/oauth2-proxy/v7
CVE-2026-34457 — critical · Go/github.com/oauth2-proxy/oauth2-proxy/v7
CVE-2026-41059 — high · Go/github.com/oauth2-proxy/oauth2-proxy/v7

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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.