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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-42505

Invoking Encrypted Client Hello privacy leak in crypto/tls

Description

Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Go standard library crypto/tls

Default version status: unaffected

  • 0 to < 1.25.12affected
  • 1.26.0-0 to < 1.26.5affected
  • 1.27.0-0 to < 1.27.0-rc.2affected

References