Is github.com/oauth2-proxy/oauth2-proxy/v7 affected by CVE-2026-34457?

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

Is CVE-2026-34457 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

critical

CVE-2026-34457

Q: Is CVE-2026-34457 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

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

Summary

OAuth2 Proxy's Health Check User-Agent Matching Bypasses Authentication in auth_request Mode

Severity: critical
EPSS: 0.5% (p37)
Also known as: GHSA-5hvv-m4w4-gf6v#github.com/oauth2-proxy/oauth2-proxy, GHSA-5hvv-m4w4-gf6v#github.com/oauth2-proxy/oauth2-proxy/v7, BIT-oauth2-proxy-2026-34457
Published: 2026-04-14

References

Related advisories

CVE-2026-40575 — critical · Go/github.com/oauth2-proxy/oauth2-proxy/v7
CVE-2026-41059 — high · Go/github.com/oauth2-proxy/oauth2-proxy/v7
CVE-2026-40574 — medium · 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.