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A vulnerability in golang-1.10 packages for Ubuntu allows passive network observers to de-anonymize handshakes using Encrypted Client Hello by disclosing pre-shared key identities in the unencrypted client hello message. This issue affects multiple Ubuntu LTS and standard releases across versions explicitly listed. The vulnerability has a CVSS 3.1 vector indicating network attack vector, low complexity, no privileges or user interaction required, and impacts confidentiality only. No known exploits are reported, and no patch or remediation information is provided in the source data.

The golang-1.10 package in Ubuntu contains a vulnerability where handshakes that use Encrypted Client Hello (ECH) can be de-anonymized by a passive network observer. This occurs because pre-shared key (PSK) identities are disclosed in the unencrypted client hello message, revealing information that should remain confidential. The vulnerability affects numerous Ubuntu versions from 14.04 LTS through 26.04 LTS and standard releases. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, indicating network attack vector, low attack complexity, no privileges or user interaction required, unchanged scope, and a low confidentiality impact without integrity or availability impact. There is no information on available patches or fixes in the provided data.

Detailed information about UBUNTU-CVE-2026-42505 affecting null golang-1.10. Get real-time updates, technical details, and mitigation strategies.

UBUNTU-CVE-2026-42505 - Live Threat Intelligence - Threat Radar | OffSeq.com

UBUNTU-CVE-2026-42505

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