Rustls: Session Debug formatting exposes TLS master secrets and resumption PSKs

影響: rust:rustls < 0.23.46 → 0.23.46, rust:rustls >= 0.24.0-dev.1, < 0.24.0-dev.2 → 0.24.0-dev.2

Formatting a client session value with Debug exposes its TLS 1.2 master secret or TLS 1.3 resumption PSK. A custom session store that logs these values can disclose keys to readers of the logs. Ordinary connection and built-in cache diagnostics remain redacted, and the session-store interface already warns that its values are sensitive. Details Derived formatters traverse the session's secret-bearing fields. This conflicts with the project's explicit [key-material redaction policy](https://gith…

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On 10/28/2026, 01:08 AM, GitHub Advisory Database published "Rustls: Session Debug formatting exposes TLS master secrets and resumption PSKs" (type: Advisory). Severity is "Medium" (medium). Related technologies: Rust.