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Reactor Netty HTTP Server, in versions 1.0.11 - 1.0.23, may log request headers in some cases of invalid HTTP requests. The logged headers may reveal valid access tokens to those with access to server logs. This may affect only invalid HTTP requests where logging at WARN level is enabled.
Users of affected versions should apply the following mitigation. 1.0.x users that don't use the default log level (ERROR) should upgrade to 1.0.24 (reactor-bom 2020.0.24). No other steps are necessary. Release that have fixed this issue include: