# oauth2 (RubyGems) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://rubygems.org/gems/oauth2

## Advisories (1)

### [CVE-2026-54603](https://cve.now/CVE-2026-54603): OAuth2::Client#request: Protocol-relative redirect Location overrides authority, leaking bearer Authorization to attacker host

- Severity: High 8.6
- Published: Jul 28, 2026
- Affected: from 0.4.0, fixed in 2.0.22.

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