Incorrect Authorization Affecting github.com/oauth2-proxy/oauth2-proxy/v7 package, versions <7.15.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMOAUTH2PROXYOAUTH2PROXYV7-16121198
- published22 Apr 2026
- disclosed21 Apr 2026
- creditkodareef5
Introduced: 21 Apr 2026
CVE-2026-40574 Â (opens in a new tab)How to fix?
Upgrade github.com/oauth2-proxy/oauth2-proxy/v7 to version 7.15.2 or higher.
Overview
github.com/oauth2-proxy/oauth2-proxy/v7 is a reverse proxy that provides authentication with Google, Github or other providers.
Affected versions of this package are vulnerable to Incorrect Authorization in the email domain validation. An attacker can gain unauthorized access by submitting a specially crafted email claim containing multiple '@' characters, such as attacker@evil.com@company.com, which may bypass domain restrictions. This is only exploitable if the deployment relies on email domain restrictions and accepts email claim values from identity providers or claim mappings that do not strictly enforce normal email syntax.