Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2026-39832

Deserialization of Untrusted Data

Published: May 22, 2026 | Modified: Jul 10, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
8.7 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-39832
CWEhttps://cwe.mitre.org/data/definitions/502.html

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

NameVendorStart VersionEnd Version
CryptoGolang*0.52.0 (excluding)
Red Hat Enterprise Linux 10RedHatbuildah-2:1.43.1-3.el10_2*
Red Hat Enterprise Linux 10RedHatpodman-7:5.8.2-4.el10_2*
Red Hat Enterprise Linux 8RedHatcontainer-tools:rhel8-8100020260701102925.afee755d*
Red Hat Enterprise Linux 9RedHatpodman-6:5.8.2-4.el9_8*
Red Hat Enterprise Linux 9RedHatbuildah-2:1.43.1-3.el9_8*
RHEM 1.0 for RHEL 9RedHatflightctl-0:1.0.3-1.el9em*
Red Hat Advanced Cluster Security for Kubernetes 4.10RedHatadvanced-cluster-security/rhacs-scanner-rhel8:1782891789*
Red Hat Advanced Cluster Security for Kubernetes 4.10RedHatadvanced-cluster-security/rhacs-scanner-slim-rhel8:1782891789*
Red Hat Advanced Cluster Security for Kubernetes 4.9RedHatadvanced-cluster-security/rhacs-scanner-rhel8:1782891812*
Red Hat Advanced Cluster Security for Kubernetes 4.9RedHatadvanced-cluster-security/rhacs-scanner-slim-rhel8:1782891812*
Red Hat Advanced Cluster Security for Kubernetes 4.9RedHatadvanced-cluster-security/rhacs-scanner-v4-rhel8:1783357116*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-alert-exporter-rhel9:1783502022*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-alertmanager-proxy-rhel9:1783502465*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-api-rhel9:1783502025*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-cli-artifacts-rhel9:1783502494*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-db-setup-rhel9:1783502401*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-pam-issuer-rhel9:1783502403*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-periodic-rhel9:1783502022*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-telemetry-gateway-rhel9:1783502023*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-userinfo-proxy-rhel9:1783502029*
Red Hat Edge Manager 1.0RedHatrhem/flightctl-worker-rhel9:1783502445*
Red Hat OpenShift Builds 1.7.4RedHatopenshift-builds/openshift-builds-controller-rhel9:1783057515*
Red Hat OpenShift Builds 1.7.4RedHatopenshift-builds/openshift-builds-git-cloner-rhel9:1783057529*
Red Hat OpenShift Builds 1.7.4RedHatopenshift-builds/openshift-builds-image-bundler-rhel9:1783057884*
Red Hat OpenShift Builds 1.7.4RedHatopenshift-builds/openshift-builds-image-processing-rhel9:1783058067*
Red Hat OpenShift Builds 1.7.4RedHatopenshift-builds/openshift-builds-waiters-rhel9:1783057868*
Red Hat OpenShift Builds 1.7.4RedHatopenshift-builds/openshift-builds-webhook-rhel9:1783058284*
Red Hat Openshift Data Foundation 4.22RedHatodf4/cephcsi-rhel9:1782932114*
Red Hat Openshift Data Foundation 4.22RedHatodf4/cephcsi-rhel9-operator:1782931768*
Red Hat Openshift Data Foundation 4.22RedHatodf4/devicefinder-rhel9:1782932104*
Red Hat Openshift Data Foundation 4.22RedHatodf4/mcg-core-rhel9:1783536000*
Red Hat Openshift Data Foundation 4.22RedHatodf4/mcg-rhel9-operator:1783535989*
Red Hat Openshift Data Foundation 4.22RedHatodf4/ocs-client-console-rhel9:1783536515*
Red Hat Openshift Data Foundation 4.22RedHatodf4/ocs-client-rhel9-operator:1782932521*
Red Hat Openshift Data Foundation 4.22RedHatodf4/ocs-metrics-exporter-rhel9:1783018461*
Red Hat Openshift Data Foundation 4.22RedHatodf4/ocs-rhel9-operator:1783018421*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-blackbox-exporter-rhel9:1782932812*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-cli-rhel9:1783537001*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-cloudnative-pg-rhel9-operator:1782932919*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-console-rhel9:1783537586*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-cosi-sidecar-rhel9:1782932969*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-csi-addons-rhel9-operator:1782933015*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-csi-addons-sidecar-rhel9:1782933042*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-drbd-rhel9:1783537392*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-external-snapshotter-rhel9-operator:1782933235*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-external-snapshotter-sidecar-rhel9:1782933251*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-multicluster-console-rhel9:1783537955*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-multicluster-rhel9-operator:1782933417*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-must-gather-rhel9:1783537742*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odf-rhel9-operator:1782933602*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odr-rhel9-operator:1783019377*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odr-volsync-plugin-mover-rhel9:1782934054*
Red Hat Openshift Data Foundation 4.22RedHatodf4/odr-volsync-plugin-rhel9-operator:1782934036*
Red Hat Openshift Data Foundation 4.22RedHatodf4/rook-ceph-rhel9-operator:1782934284*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.2*
Red Hat Trusted Artifact Signer 1.4RedHatrhtas/gitsign-rhel9:1783332061*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.2*
Golang-go.cryptoUbuntuesm-apps/focal*
Golang-go.cryptoUbuntuesm-apps/jammy*
Golang-go.cryptoUbuntuesm-apps/noble*
Golang-go.cryptoUbuntuesm-apps/resolute*
Golang-go.cryptoUbuntujammy*
Golang-go.cryptoUbuntunoble*
Golang-go.cryptoUbuntuquesting*
Golang-go.cryptoUbunturesolute*
Golang-go.cryptoUbuntuupstream*
LxdUbuntuesm-infra-legacy/xenial*
LxdUbuntuesm-infra/bionic*
SnapdUbuntuquesting*

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

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