high7.4
CVE-2026-50631
A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple vali…
Impact
A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple valid Access Tokens, when 'recycleRefreshTokens' is set to false. A leaked refresh token can be replayed concurrently by multiple attackers or threads. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.apache.cxf:cxf-rt-rs-security-oauth2 | >= 4.2.0, < 4.2.2 | 4.2.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Cxf | before 4.1.7 from 4.2.0 before 4.2.2 |