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RUSTSEC-2026-0346Published

`Debug` impls for client session values expose TLS secrets

Exact source revision recorded 24 Oct 2026 13:19:54 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

osv · RUSTSEC-2026-0346

Published

The `Debug` implementations of `Tls12ClientSessionValue` and `Tls13ClientSessionValue` were derived, and so included the TLS 1.2 master secret or TLS 1.3 resumption PSK in their output. Custom `ClientSessionStore` implementations that format these values with `Debug` (for example, when logging) could disclose these secrets to readers of the logs. This conflicts with rustls's [key-material redaction policy](https://github.com/rustls/rustls/blob/99f2358cae2954837dbb866faf6727de75489ab9/SECURITY.md#boundary-public-api). Ordinary connection and built-in session cache `Debug` output is redacted and is not affected.

Source published
14 Oct 2026 12:00:00 UTC
Source modified
14 Oct 2026 13:30:02 UTC
Observed here
24 Oct 2026 13:19:54 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N

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Sources read 30 Oct 15:55 UTC · 272 of 272 readable · 271 fully read · documentation 469/469 current

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