CVE-2026-42505

mediumpriority · track · 0EPSS 0.004 · 32 %ileDEEUFRRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.38% (32nd) EPSS

CVSS 5.3 · medium

Is it mine?

103 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondaryexploitability 3.9 · impact 1.4

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-201USCWE-201US

affected products (103)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
IBM Business Automation Workflowall versionscert_bundDEcpe:/a:ibm:business_automation_workflow:-
IBM Security Verify Accessall versionscert_bundDEcpe:/a:ibm:security_verify_access:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat OpenShift Container Platformall versionscert_bundDEcpe:/a:redhat:openshift:container_platform
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
golang Go< 1.26.5cert_bundDE
Go standard library crypto/tls0 → 1.25.12enisa_euvdEU
Go standard library crypto/tls1.26.0-0 → 1.26.5enisa_euvdEU
Go standard library crypto/tls1.27.0-0 → 1.27.0-rc.2enisa_euvdEU
Red Hat, Inc. Assisted Installer for Red Hat OpenShift Container Platform≤ 2fstec_bduRU
Red Hat, Inc. Builds for Red Hat OpenShiftall versionsfstec_bduRU
Red Hat, Inc. Compliance Operatorall versionsfstec_bduRU
Red Hat, Inc. Confidential Compute Attestationall versionsfstec_bduRU
Red Hat, Inc. Cryostat≤ 4fstec_bduRU
Red Hat, Inc. Custom Metric Autoscaler operator for Red Hat Openshiftall versionsfstec_bduRU
Red Hat, Inc. Deployment Validation Operatorall versionsfstec_bduRU

showing 20 of 103

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2239Golang Go: Mehrere Schwachstellen ermöglichen Offenlegung von InformationenDeutsch2026-07-07csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Golang Go ausnutzen, um Informationen offenzulegen.
BIT-golang-2026-42505Invoking Encrypted Client Hello privacy leak in crypto/tls2026-07-14vendor · osvUS
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.
CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
GO-2026-5856Invoking Encrypted Client Hello privacy leak in crypto/tls2026-07-07vendor · osvUS
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.

also known as (8)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund certfr NVD CVE.org MITRE

published 2026-07-08modified 2026-10-25

references (12)

External citations — patches, advisories, analysis.

scry

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