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CVE-2026-42505 is an information-disclosure vulnerability in the Go standard library's TLS implementation. During handshakes using Encrypted Client Hello (ECH), pre-shared key identities are disclosed in the unencrypted ClientHello. A passive network observer can use these exposed identities to de-anonymize affected handshakes, undermining the privacy protection provided by ECH.
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118 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An information-disclosure vulnerability affecting dev-lang/go allows passive network observers to de-anonymize Encrypted Client Hello handshakes through exposed pre-shared key identities. The advisory rates it Medium, with a CVSS v3 base score of 5.3, and recommends updating to version 19506.505.25 or later.
A confidentiality vulnerability affecting dev-lang/go exposes pre-shared key identities in the unencrypted Client Hello, allowing passive network observers to de-anonymize handshakes using Encrypted Client Hello. The advisory assigns a medium severity and CVSS v3 base score of 5.3, and recommends updating to package version 19216.700.23 or later.
An information disclosure vulnerability exposes pre-shared key identities in the unencrypted Client Hello during handshakes using Encrypted Client Hello, allowing passive network observers to de-anonymize them. The advisory identifies amazon-ecr-credential-helper versions before 0.12.0-4 on Amazon Linux 2 as affected. A security update is available under advisory ALAS2NITRO-ENCLAVES-2026-121.
An information disclosure vulnerability exposes pre-shared key identities in the unencrypted Client Hello, allowing passive network observers to de-anonymize handshakes using Encrypted Client Hello. The advisory identifies amazon-ecr-credential-helper versions earlier than 0.12.0-4 on Amazon Linux 2 as affected.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.