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CVE-2026-42505

Invoking Encrypted Client Hello privacy leak in crypto/tls

Published: Jul 8, 2026Updated: Jul 13, 2026 Sources: CVE List NVDCWE-201
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 69.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-201

Affected Products

golang
oss-project·US
go
OSS Libraries
Go standard library
oss-project·USaka html/template, golang standard library, crypto/x509, net/http
crypto/tlsLibraryLibrary
OSS Libraries / go

Exploitability

Official Patch Available
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References

https://go.dev/cl/775960
go.dev
https://go.dev/issue/79282
go.dev
https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc
groups.google.com
and 1 more references View all →

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