No exploitation reportedFix available

CVE-2026-32283

Q: Is CVE-2026-32283 actively exploited?

Active exploitation of CVE-2026-32283 has not been confirmed. Its EPSS score was 0.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-32283?

CVE-2026-32283 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls

No exploitation reported by the sources we read.

Published2026-04-08
Fixed in1.26.2 · 1.25.9
WeaknessCWE-764 · CWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.

Timeline

dates in UTC

2026-04-0802:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-32283?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-32283?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Branch	Affected	Fixed in	Source
1.26	≥ 1.26.0, < 1.26.2	1.26.2	NVD
1.25	< 1.25.9	1.25.9	NVD · OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

aardvark-dnsAlmaLinux:8all versions · fixed in 2:1.10.1-2.module_el8.10.0+3901+4b80ecd7
buildahAlmaLinux:10all versions · fixed in 2:1.43.1-2.el10_2and 1 other package
buildahAlmaLinux:9all versions · fixed in 2:1.43.1-2.el9_8and 1 other package
buildahAlmaLinux:8all versions · fixed in 2:1.33.14-3.module_el8.10.0+4211+49ea0979
buildah-testsAlmaLinux:8all versions · fixed in 2:1.33.14-3.module_el8.10.0+4136+16425343
cockpit-podmanAlmaLinux:8all versions · fixed in 84.1-1.module_el8.10.0+4102+6c76e544
conmonAlmaLinux:8all versions · fixed in 3:2.1.10-1.module_el8.10.0+4068+0e21408f
container-selinuxAlmaLinux:8all versions · fixed in 2:2.229.0-3.module_el8.10.0+4211+49ea0979

43 more package ranges on OSV.dev

Vendor advisories

CVE-2026-32283 Red Hat Product Security3,339 products fixed · 130 known affected
crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages
rhai/assisted-installer-rhel9 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · openshift-builds/openshift-builds-waiters-rhel9 as a component of Builds for Red Hat OpenShift · compliance/openshift-compliance-rhel8-operator as a component of Compliance Operator · +127 more
RHSA-2026:87410 Red Hat Product Security5 products fixed
Red Hat Security Advisory: RHOAI 2.25.12 - Red Hat OpenShift AI
RHSA-2026:84734 Red Hat Product Security4 products fixed
Red Hat Security Advisory: RHOAI 3.4.5 - Red Hat OpenShift AI
RHSA-2026:83013 Red Hat Product Security4 products fixed
Red Hat Security Advisory: Logging for Red Hat OpenShift - 6.0.17
RHSA-2026:82372 Red Hat Product Security4 products fixed
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
RHSA-2026:82354 Red Hat Product Security4 products fixed
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2

163 more advisories

Full record on NVD

Fix

Update Go to 1.26.2 · 1.25.9
Vendor fix Red Hat Product Security RHSA-2026:87410 · 5 productsFor Red Hat OpenShift AI 2.25.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.redhat.com/en/documentation/red_hat_openshift_ai/
Vendor fix Red Hat Product Security RHSA-2026:84734 · 4 productsFor Red Hat OpenShift AI 3.4.5 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.redhat.com/en/documentation/red_hat_openshift_ai/
Vendor fix Red Hat Product Security RHSA-2026:83013 · 4 productsFor OpenShift Container Platform 4.16 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html/relea…
Vendor fix Red Hat Product Security RHSA-2026:82372 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. The steps to apply the upgraded images are different depending on the installation plan approval policy you used when installing the cert-manager Operator for Red Hat OpenShift. - If t…
Vendor fix Red Hat Product Security RHSA-2026:80684 · 1 productThe container images provided by this update can be downloaded from the Red Hat container registry at registry.redhat.io or registry.access.redhat.com using the 'podman pull' command. For more information about the images, search the image name in the Red Hat Ecosystem Catalog.
Vendor fix Red Hat Product Security RHSA-2026:76752 · 2 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.openshift.com/container-platform/latest/updating/updating_a_cluster/updating-cluster-cli.html

Advisories and patches

go.devPatch
groups.google.comRelease Notes
pkg.go.devVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-04-13
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52026-04-13
CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-764read 2026-10-23
NVDweakness (CWE)CWE-770read 2026-10-23
FIRST EPSSEPSS score0.6 %2026-10-22
OSVaffected packages—
Microsoft MSRCadvisory—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-04-08
Last Modified: 2026-09-18
NVD status: Modified
MSRC Title: Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls

Frequently asked questions

What is CVE-2026-32283?

Is CVE-2026-32283 actively exploited?

Active exploitation of CVE-2026-32283 has not been confirmed. Its EPSS score was 0.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-32283?

CVE-2026-32283 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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