VULNERABILITY INTELLIGENCE

CVE-2026-42505

CVSS score5.3 MEDIUM

EPSS probability0.38%

CISA KEVNot currently listed

Published2026-07-08

Last modified2026-10-25

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Weakness classification

134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-201

Primary references

security@golang.org — Patch
security@golang.org — Issue Tracking, Patch
security@golang.org — Mailing List, Release Notes, Vendor Advisory
security@golang.org — Vendor Advisory