medium 5.3

CVE-2025-61730 json

Handshake messages may be processed at the incorrect encryption level in crypto/tls

published 2026-01-28 9 mo ago modified 2026-09-08 2 mo ago also BIT-golang-2025-61730 , EUVD-2025-206448 , GO-2026-4340

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits: 0; none known

During the TLS 1.3 handshake if multiple messages are sent in records that span encryption level boundaries (for instance the Client Hello and Encrypted Extensions messages), the subsequent messages may be processed before the encryption level changes. This can cause some minor information disclosure if a network-local attacker can inject messages during the handshake.

Patch / fix

fixed in 3 distros 5 links 2

bitnami golang 1.24.12, 1.25.6
go stdlib 1.24.12, 1.25.6
Go standard library crypto/tls 1.24.12, 1.25.6

red hat suse opensuse alpine azure linux

golang1.25 hummingbird 1 1.25.9-1.hum1
golang1.25-bin hummingbird 1 1.25.9-1.hum1
golang1.25-src hummingbird 1 1.25.9-1.hum1
golang1.25-misc hummingbird 1 1.25.9-1.hum1
golang1.25-tests hummingbird 1 1.25.9-1.hum1
golang1.25-shared hummingbird 1 1.25.9-1.hum1
golang1.26 hummingbird 1 1.26.2-1.hum1
golang1.26-bin hummingbird 1 1.26.2-1.hum1

red hat advisories RHSA-2026:7385 RHSA-2026:7291

go1.24-openssl SLES for SAP applications 16.0, SLES 16.0 1.24.13-160000.1.1
go1.25-openssl SLES for SAP applications 16.0, SLES 16.0 1.25.7-160000.1.1
govulncheck-vulndb openSUSE Leap 15.6 0.0.20260128T190828-150000.1.143.1
go1.24-openssl SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 1.24.12-150600.13.15.1
go1.25-openssl SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 1.25.6-150600.13.9.1
go1.25-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.25.6-150000.1.9.1
go1.24-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.24.12-150000.1.18.1
go1.25 SLES for SAP applications 16.0, SLES 16.0 1.25.6-160000.1.1

suse advisories SUSE-SU-2026:20629-1 SUSE-SU-2026:20623-1 SUSE-SU-2026:0354-1 SUSE-SU-2026:0308-1 SUSE-SU-2026:0298-1 SUSE-SU-2026:0297-1

govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
go1.24-openssl openSUSE Leap 16.0 1.24.13-160000.1.1
go1.25-openssl openSUSE Leap 16.0 1.25.7-160000.1.1
go1.25 openSUSE Leap 16.0 1.25.6-160000.1.1
go1.24 openSUSE Leap 16.0 1.24.12-160000.1.1
go1.24 openSUSE Tumbleweed 1.24.12-1.1
go1.25 openSUSE Tumbleweed 1.25.6-1.1

opensuse advisories openSUSE-SU-2026:21483-1 openSUSE-SU-2026:20308-1 openSUSE-SU-2026:20301-1 openSUSE-SU-2026:20085-1 openSUSE-SU-2026:20077-1 openSUSE-SU-2026:10063-1

go Alpine 3.22 1.24.12-r0
go Alpine 3.24, Alpine 3.23 1.25.6-r0

alpine advisories ALPINE-CVE-2025-61730

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

msft-golang CBL-Mariner 2.0 1.24.12-1
golang Azure Linux 3.0 1.24.12-1
golang Azure Linux 3.0 1.25.6-1

azure linux advisories AZL-75648 AZL-75701 AZL-75731

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

go.dev/cl/724120 patch
go.dev/issue/76443 patch

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-61730 updated 2026-11-05 cvss 5.3

crypto/tls: Handshake messages may be processed at the incorrect encryption level in crypto/tls

Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 rhai/assisted-installer-rhel9 Red Hat Builds for Red Hat OpenShift openshift-builds/openshift-builds-waiters-rhel9 Red Hat Compliance Operator compliance/openshift-compliance-operator-bundle Red Hat Confidential Compute Attestation build-of-trustee/trustee-rhel9-operator, openshift-sandboxed-containers/osc-monitor-rhel9 Red Hat Cryostat 4 cryostat/cryostat-storage-rhel9 Red Hat Custom Metric Autoscaler operator for Red Hat Openshift custom-metrics-autoscaler/custom-metrics-autoscaler-rhel9

+34 more productsfewer

Red Hat Deployment Validation Operator dvo/deployment-validation-rhel8-operator Red Hat External Secrets Operator for Red Hat OpenShift external-secrets-operator/external-secrets-rhel9 Red Hat ExternalDNS Operator edo/external-dns-rhel8, edo/external-dns-rhel9 Red Hat Fence Agents Remediation Operator workload-availability/fence-agents-remediation-rhel8-operator Red Hat File Integrity Operator compliance/openshift-compliance-operator-bundle Red Hat Gatekeeper 3 gatekeeper/gatekeeper-rhel9-operator Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/eventrouter-rhel9, openshift-logging/logging-loki-rhel9 Red Hat Logical Volume Manager Storage lvms4/topolvm-rhel8, lvms4/topolvm-rhel9, lvms4/lvms-rhel9-operator Red Hat Machine Deletion Remediation Operator workload-availability/machine-deletion-remediation-rhel8-operator Red Hat Migration Toolkit for Applications 8 mta/mta-cli-rhel9 Red Hat Migration Toolkit for Containers rhmtc/openshift-migration-registry-rhel8 Red Hat mirror registry for Red Hat OpenShift openshift/mirror-registry-rhel8 Red Hat mirror registry for Red Hat OpenShift 2 openshift/mirror-registry-rhel8 Red Hat Multiarch Tuning Operator multiarch-tuning/multiarch-tuning-rhel9-operator Red Hat Multicluster Engine for Kubernetes multicluster-engine/discovery-rhel9 Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-agent-rhel9 Red Hat Network Observability Operator network-observability/network-observability-cli-rhel9 Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-rhel8-operator Red Hat Node Maintenance Operator workload-availability/node-maintenance-rhel8-operator, container-native-virtualization/node-maintenance-operator Red Hat OpenShift API for Data Protection oadp/oadp-velero-rhel9 Red Hat OpenShift Developer Tools and Services openshift4/ose-jenkins, ocp-tools-4/jenkins-rhel8, ocp-tools-4/jenkins-rhel9, ocp-tools-4/jenkins-agent-base-rhel9 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-rhel9-operator Red Hat OpenShift Serverless openshift-serverless-1/kn-plugin-event-sender-rhel9 Red Hat OpenShift Service Mesh 2 openshift-service-mesh/kiali-rhel8, ossm-2/openshift-golang-builder-container Red Hat OpenShift Service Mesh 3 openshift-service-mesh/kiali-rhel9, ossm-2/openshift-golang-builder-container Red Hat OpenShift Source-to-Image (S2I) source-to-image/source-to-image-rhel8 Red Hat Power monitoring for Red Hat OpenShift openshift-power-monitoring/kepler-rhel9 Red Hat 3scale API Management Platform 2 3scale-amp26/operator, rhcl-1/authorino-rhel9, 3scale-amp26/3scale-operator, 3scale-amp2/3scale-rhel7-operator, 3scale-amp2/3scale-rhel9-operator, 3scale-tech-preview/authorino-rhel9 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/subctl-rhel9 Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8 Red Hat Ansible Automation Platform 2 receptor, python-grpcio, python3x-grpcio, python3.11-grpcio, python3.11-galaxy-ng, automation-gateway-proxy, +4 more Red Hat build of Apache Camel - HawtIO 4 hawtio-operator-container Red Hat Ceph Storage 5 rhel8/grafana, rhel9/grafana, rhceph/grafana-rhel9 Red Hat Ceph Storage 6 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mib, +19 more

affected: workaround, no fix available “Fix deferred”

28 more affected, 2 more fixed in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 9 mo ago (2026-02-02)

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
OSV	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	golang	<1.24.12 >=1.25.0, <1.25.6	1.24.12 1.25.6
go	stdlib	<1.24.12 >=1.25.0, <1.25.6	1.24.12 1.25.6

Affected products

Go standard library crypto/tls

References

go.dev /cl/724120
patch
go.dev /issue/76443
patch, report
pkg.go.dev /vuln/GO-2026-4340
vendor-advisory, advisory
groups.google.com /g/golang-announce/c/Vd2tYVM8eUc
release-notes, article, web
nvd.nist.gov /vuln/detail/CVE-2025-61730
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary