Low severity3.7NVD Advisory· Published Nov 8, 2026
CVE-2026-123611
CVE-2026-123611
Description
rustls before 0.23.46 contains a key exchange downgrade vulnerability that allows network attackers to poison the per-server-name key-exchange group record via an unauthenticated ServerHello. Attackers can answer one connection with a ServerHello selecting X25519, causing later ClientHellos to send only classical shares and lose post-quantum confidentiality.
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Affected products
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