CVE-2026-42505

medium

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.

References

https://github.com/kun9497/assay

https://pkg.go.dev/vuln/GO-2026-5856

https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc

https://go.dev/issue/79282

https://go.dev/cl/775960

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-42317

Details

Source: Mitre, NVD

Published: 2026-07-08

Updated: 2026-10-25

Named Vulnerability: GO-2026-5856Named Vulnerability: GHSA-ff52-ph69-cf7x

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.3

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