BIT-golang-2026-42505Published

Invoking Encrypted Client Hello privacy leak in crypto/tls

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-42505

Published

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.

Source published: 8 Jul 2026 15:46:33 UTC
Source modified: 8 Jul 2026 19:38:17 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

euvd · EUVD-2026-42317

Published

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.

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jul 8, 2026, 3:46:33 PM

dateUpdated: Jul 8, 2026, 7:38:17 PM

24 related source bulletins · separate from aliases

RHSA-2026:91249: Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (Neuron)

CVE-2025-69418 · CVE-2026-6653 · CVE-2026-11979 · CVE-2026-13346 · CVE-2026-25679 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27137 · CVE-2026-27138 · CVE-2026-27139 · CVE-2026-27141 · CVE-2026-27142 · CVE-2026-27145 · CVE-2026-28390 · CVE-2026-31790 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-32288 · CVE-2026-32289 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-34182 · CVE-2026-34183 · CVE-2026-39820 · CVE-2026-39822 · CVE-2026-39823 · CVE-2026-39825 · CVE-2026-39826 · CVE-2026-39836 · CVE-2026-42499 · CVE-2026-42502 · CVE-2026-42504 · CVE-2026-42505 · CVE-2026-42506 · CVE-2026-42507 · CVE-2026-45445 · CVE-2026-45447 · CVE-2026-74860 · CVE-2026-86138 · CVE-2026-86140 · CVE-2026-86142 · CVE-2026-86143 · CVE-2026-86144 · CVE-2026-86145 · CVE-2026-89090 · CVE-2026-89161 · CVE-2026-103111 · CVE-2026-114406

WID-SEC-W-2026-2239: Golang Go: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen

CVE-2026-39822 · CVE-2026-42505

SUSE-SU-2026:22641-1: Security update for go1.26-openssl

CVE-2026-39822 · CVE-2026-42505

msrc_CVE-2026-42505: Invoking Encrypted Client Hello privacy leak in crypto/tls

CVE-2026-42505

openSUSE-SU-2026:21321-1: Security update for go1.26-openssl

CVE-2026-39822 · CVE-2026-42505

openSUSE-SU-2026:21341-1: Security update for go1.26

CVE-2026-39822 · CVE-2026-42505

RHSA-2026:36510: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-39822 · CVE-2026-42505

openSUSE-SU-2026:11232-1: go1.26-1.26.5-1.1 on GA media

CVE-2026-39822 · CVE-2026-42505

openSUSE-SU-2026:11471-1: tekton-cli-0.46.0-1.1 on GA media

CVE-2026-42505

RHSA-2026:37436: Red Hat Security Advisory: golang security, bug fix, and enhancement update

CVE-2026-39821 · CVE-2026-39822 · CVE-2026-42505

SUSE-SU-2026:22643-1: Security update for go1.25

CVE-2026-25679 · CVE-2026-27139 · CVE-2026-27142 · CVE-2026-39822 · CVE-2026-42505

openSUSE-SU-2026:11216-1: mihomo-1.19.28-1.1 on GA media

CVE-2026-42505

SUSE-SU-2026:22656-1: Security update for go1.26

CVE-2026-39822 · CVE-2026-42505

RHSA-2026:36477: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-39822 · CVE-2026-42505

SUSE-SU-2026:22638-1: Security update for go1.25-openssl

CVE-2025-61732 · CVE-2025-68121 · CVE-2026-25679 · CVE-2026-27139 · CVE-2026-27140 · CVE-2026-27142 · CVE-2026-27143 · CVE-2026-27144 · CVE-2026-27145 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-32283 · CVE-2026-32288 · CVE-2026-32289 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-39817 · CVE-2026-39819 · CVE-2026-39820 · CVE-2026-39822 · CVE-2026-39823 · CVE-2026-39825 · CVE-2026-39826 · CVE-2026-39836 · CVE-2026-42499 · CVE-2026-42501 · CVE-2026-42504 · CVE-2026-42505 · CVE-2026-42507

RHSA-2026:54773: Red Hat Security Advisory: Red Hat build of OpenTelemetry 3.10.2 release

CVE-2026-39822 · CVE-2026-41178 · CVE-2026-42505 · CVE-2026-46600 · CVE-2026-56852

openSUSE-SU-2026:11798-1: go-passbolt-cli-0.5.2-1.1 on GA media

CVE-2026-42505

RHSA-2026:37435: Red Hat Security Advisory: golang security, bug fix, and enhancement update

CVE-2026-39821 · CVE-2026-39822 · CVE-2026-42505

RHSA-2026:91248: Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (Neuron)

CVE-2025-69418 · CVE-2026-6653 · CVE-2026-11979 · CVE-2026-13346 · CVE-2026-25679 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27137 · CVE-2026-27138 · CVE-2026-27139 · CVE-2026-27141 · CVE-2026-27142 · CVE-2026-27145 · CVE-2026-28390 · CVE-2026-31790 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-32288 · CVE-2026-32289 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-34182 · CVE-2026-34183 · CVE-2026-39820 · CVE-2026-39822 · CVE-2026-39823 · CVE-2026-39825 · CVE-2026-39826 · CVE-2026-39836 · CVE-2026-42499 · CVE-2026-42502 · CVE-2026-42504 · CVE-2026-42505 · CVE-2026-42506 · CVE-2026-42507 · CVE-2026-44172 · CVE-2026-45445 · CVE-2026-45447 · CVE-2026-74860 · CVE-2026-86138 · CVE-2026-86140 · CVE-2026-86142 · CVE-2026-86143 · CVE-2026-86144 · CVE-2026-86145 · CVE-2026-89090 · CVE-2026-89161 · CVE-2026-103111 · CVE-2026-114406

RHSA-2026:66364: Red Hat Security Advisory: git-lfs security update

CVE-2026-33818 · CVE-2026-42505 · CVE-2026-42507 · CVE-2026-56860 · CVE-2026-56862

openSUSE-SU-2026:21319-1: Security update for go1.25-openssl

openSUSE-SU-2026:11212-1: go1.25-1.25.12-1.1 on GA media

CVE-2026-39822 · CVE-2026-42505

RHSA-2026:38995: Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update

CVE-2026-27145 · CVE-2026-39821 · CVE-2026-39822 · CVE-2026-42504 · CVE-2026-42505 · CVE-2026-42507

openSUSE-SU-2026:21324-1: Security update for go1.25

CVE-2026-25679 · CVE-2026-27139 · CVE-2026-27142 · CVE-2026-39822 · CVE-2026-42505

Source published: Jul 8, 2026, 3:46:33 PM (timezone not stated)
Source modified: Jul 8, 2026, 7:38:17 PM (timezone not stated)
Observed here: 7 Nov 2026 09:35:05 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvd · CVE-2026-42505

Published

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.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-201

Original publisher date fields

published: 2026-07-08T17:17:21.497

lastModified: 2026-10-25T17:10:00.197

2 source CPE criteria · context only

cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
cpe:2.3:a:golang:go:1.27:rc1:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 8 Jul 2026 17:17:21 UTC
Source modified: 25 Oct 2026 17:10:00 UTC
Observed here: 27 Oct 2026 11:12:04 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

osv · GO-2026-5856

Published

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.

Source published: 7 Jul 2026 21:34:47 UTC
Source modified: 3 Oct 2026 10:41:52 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.