Incorrect Behavior Order Affecting rust-rustls package, versions *


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-RUSTRUSTLS-22283386
  • published8 Nov 2026
  • disclosed8 Nov 2026

Introduced: 8 Nov 2026

NewCVE-2026-123612  (opens in a new tab)
CWE-696  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest rust-rustls.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rust-rustls package and not the rust-rustls package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

rustls 0.23.44 and 0.23.45 contain an information disclosure vulnerability that sends application data buffered before the handshake completes to the client-facing server when Encrypted Client Hello is rejected. Because start_traffic() queues plaintext from ClientConnection::writer() before sending the ech_required alert, the authenticated public_name server receives data intended for the inner server.

CVSS Base Scores

version 3.1