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TI-2026-28704 Aliases CVE-2026-39822GHSA-xcgv-8mv7-v8c7

Root escape via symlink plus trailing slash in os

Priority LOW 36CWE-61Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 27 fixed, 12 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing outside of the root.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Fix Partial os (Go standard library): 1.25.12, 1.26.5, 1.27.0-rc.2Red Hat: 36 advisoriesRed Hat: 27 fixed, 12 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Go standard libraryosbefore 1.25.12; 1.26.0-0 to before 1.26.5; 1.27.0-0 to before 1.27.0-rc.21.25.12, 1.26.5, 1.27.0-rc.2Patch availableCNA
  • os VendorGo standard library Affected before 1.25.12; 1.26.0-0 to before 1.26.5; 1.27.0-0 to before 1.27.0-rc.2 Fixed in 1.25.12, 1.26.5, 1.27.0-rc.2 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*1.24.0 to before 1.25.12; 1.26.0 to before 1.26.5VulnerableGo standard library
cpe:2.3:a:golang:go:1.27:rc1:*:*:*:*:*:*1.27 rc1VulnerableGo standard library
  • cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* Versions 1.24.0 to before 1.25.12; 1.26.0 to before 1.26.5 Vulnerable ·Go standard library
  • cpe:2.3:a:golang:go:1.27:rc1:*:*:*:*:*:* Versions 1.27 rc1 Vulnerable ·Go standard library

Remediation

  • Fix · CNA os (Go standard library) Fixed in 1.25.12, 1.26.5, 1.27.0-rc.2

Red Hat 36 advisories

  • RHSA-2026:95612 Released 2026-11-05 · Red Hat rating Important
    OpenShift Compliance Operator bug fix and enhancement update
    • OpenShift Compliance Operator 1 registry.redhat.io/compliance/openshift-compliance-rhel8-operator
  • RHSA-2026:95591 Released 2026-11-05 · Red Hat rating Important
    Cluster Observability Operator - 1.5
    • Cluster Observability Operator 1.5 registry.redhat.io/cluster-observability-operator/alertmanager-rhel9, registry.redhat.io/cluster-observability-operator/cluster-observability-rhel9-operator, registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9 +16
  • RHSA-2026:95081 Released 2026-11-04 · Red Hat rating Important
    Cluster Observability Operator - 1.5
    • Cluster Observability Operator 1.5 registry.redhat.io/cluster-observability-operator/alertmanager-rhel9, registry.redhat.io/cluster-observability-operator/cluster-observability-rhel9-operator, registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9 +16
Show 33 more Red Hat advisories
  • RHSA-2026:92303 Released 2026-10-29 · Red Hat rating Important
    multicluster engine for Kubernetes v2.8.12 security update
    • multicluster engine for Kubernetes 2.8 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/backplane-rhel9-operator, registry.redhat.io/multicluster-engine/cluster-curator-controller-rhel9 +12
  • RHSA-2026:91249 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.5.5 (Neuron)
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/base-image-neuron-rhel9
  • RHSA-2026:91248 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.4.6 (Neuron)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-neuron-rhel9
  • RHSA-2026:82372 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.18.2
    • Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
  • RHSA-2026:82354 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.18.2
    • Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
  • RHSA-2026:82347 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.18.2
    • Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
  • RHSA-2026:74511 Released 2026-10-01 · Red Hat rating Important
    Red Hat Quay 3.17.5
    • Red Hat Quay 3.17 registry.redhat.io/quay/quay-rhel9
  • RHSA-2026:70267 Released 2026-09-22 · Red Hat rating Important
    Red Hat Quay 3.14.9
    • Red Hat Quay 3.14 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:69255 Released 2026-09-21 · Red Hat rating Important
    Red Hat Quay 3.16.6
    • Red Hat Quay 3.16 registry.redhat.io/quay/quay-rhel9
  • RHSA-2026:66350 Released 2026-09-15 · Red Hat rating Important
    OpenShift Container Platform 4.21.33 packages and security update
    • Red Hat OpenShift Container Platform 4.21 openshift-4.21.0-202609022229.p2.g93afd70.assembly.stream.el10, openshift-4.21.0-202609022229.p2.g93afd70.assembly.stream.el8, openshift-4.21.0-202609022229.p2.g93afd70.assembly.stream.el9 +20
  • RHSA-2026:66375 Released 2026-09-15 · Red Hat rating Important
    OpenShift Container Platform 4.20.38 packages and security update
    • Red Hat OpenShift Container Platform 4.20 openshift-4.20.0-202609041738.p2.g4012064.assembly.stream.el8, openshift-4.20.0-202609041738.p2.g4012064.assembly.stream.el9, openshift-hyperkube-4.20.0-202609041738.p2.g4012064.assembly.stream.el8 +9
  • RHSA-2026:61253 Released 2026-08-31 · Red Hat rating Important
    golang security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) go-toolset-1.26.5-1.el9_2, golang-1.26.5-1.el9_2, golang-bin-1.26.5-1.el9_2 +5
  • RHSA-2026:57361 Released 2026-08-25 · Red Hat rating Important
    OpenShift Container Platform 4.22.11 packages and security update
    • Red Hat OpenShift Container Platform 4.22 cri-o-1.35.6-5.rhaos4.22.git41f610b.el9, cri-tools-1.35.0-3.el9, openshift-4.22.0-202608190726.p2.g05744ab.assembly.stream.el8 +17
  • RHSA-2026:59203 Released 2026-08-24 · Red Hat rating Important
    RHACS 4.10.7 security and bug fix update
    • Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10 registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8
  • RHSA-2026:59202 Released 2026-08-24 · Red Hat rating Important
    RHACS 4.9.11 security and bug fix update
    • Red Hat Advanced Cluster Security 4.9 registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8
  • RHSA-2026:57649 Released 2026-08-20 · Red Hat rating Important
    golang security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) go-toolset-1.26.5-1.el9_4, golang-1.26.5-1.el9_4, golang-bin-1.26.5-1.el9_4 +5
  • RHSA-2026:54773 Released 2026-08-13 · Red Hat rating Important
    Red Hat build of OpenTelemetry 3.10.2 release
    • Red Hat OpenShift distributed tracing 3.10.1 registry.redhat.io/rhosdt/opentelemetry-collector-rhel9, registry.redhat.io/rhosdt/opentelemetry-rhel9-operator
  • RHSA-2026:53520 Released 2026-08-11 · Red Hat rating Important
    Red Hat Quay 3.10.25
    • Red Hat Quay 3.10 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:52968 Released 2026-08-10 · Red Hat rating Important
    Red Hat Quay 3.12.21
    • Red Hat Quay 3.12 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:50931 Released 2026-08-05 · Red Hat rating Important
    Red Hat Quay 3.9.25
    • Red Hat Quay 3.9 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:49712 Released 2026-08-03 · Red Hat rating Important
    golang security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) go-toolset-1.26.5-1.el9_6, golang-1.26.5-1.el9_6, golang-bin-1.26.5-1.el9_6 +5
  • RHSA-2026:49702 Released 2026-08-03 · Red Hat rating Important
    golang security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) go-toolset-1.26.5-1.el10_0, golang-1.26.5-1.el10_0, golang-bin-1.26.5-1.el10_0 +5
  • RHSA-2026:48891 Released 2026-07-30 · Red Hat rating Important
    RHACS 4.11.2 security and bug fix update
    • Red Hat Advanced Cluster Security for Kubernetes 4.11 registry.redhat.io/advanced-cluster-security/rhacs-main-rhel9
  • RHSA-2026:44624 Released 2026-07-23 · Red Hat rating Important
    Red Hat OpenShift distributed tracing platform (Tempo) 3.10.2 release
    • Red Hat OpenShift distributed tracing 3.10.1 registry.redhat.io/rhosdt/tempo-gateway-opa-rhel9, registry.redhat.io/rhosdt/tempo-gateway-rhel9, registry.redhat.io/rhosdt/tempo-jaeger-query-rhel9 +4
  • RHSA-2026:38995 Released 2026-07-13 · Red Hat rating Important
    go-toolset:rhel8 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) delve-1.26.1-1.module+el8.10.0+24516+40554724.aarch64::go-toolset:rhel8, delve-1.26.1-1.module+el8.10.0+24516+40554724.ppc64le::go-toolset:rhel8, delve-1.26.1-1.module+el8.10.0+24516+40554724.src::go-toolset:rhel8 +22
  • RHSA-2026:38878 Released 2026-07-13 · Red Hat rating Important
    podman security update
    • Red Hat Enterprise Linux AppStream (v. 9) podman-6:5.8.2-5.el9_8, podman-docker-6:5.8.2-5.el9_8, podman-plugins-6:5.8.2-5.el9_8 +2
  • RHSA-2026:38493 Released 2026-07-13 · Red Hat rating Important
    buildah security update
    • Red Hat Enterprise Linux AppStream (v. 9) buildah-2:1.43.1-4.el9_8, buildah-tests-2:1.43.1-4.el9_8
  • RHSA-2026:38495 Released 2026-07-13 · Red Hat rating Important
    podman security update
    • Red Hat Enterprise Linux AppStream (v. 10) podman-7:5.8.2-5.el10_2, podman-docker-7:5.8.2-5.el10_2, podman-remote-7:5.8.2-5.el10_2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) podman-tests-7:5.8.2-5.el10_2
  • RHSA-2026:38494 Released 2026-07-13 · Red Hat rating Important
    buildah security update
    • Red Hat Enterprise Linux AppStream (v. 10) buildah-2:1.43.1-4.el10_2, buildah-tests-2:1.43.1-4.el10_2
  • RHSA-2026:37435 Released 2026-07-09 · Red Hat rating Important
    golang security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) go-toolset-1.26.5-1.el9_8, golang-1.26.5-1.el9_8, golang-bin-1.26.5-1.el9_8 +5
  • RHSA-2026:37436 Released 2026-07-09 · Red Hat rating Important
    golang security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) go-toolset-1.26.5-1.el10_2, golang-1.26.5-1.el10_2, golang-bin-1.26.5-1.el10_2 +5
  • RHSA-2026:36510 Released 2026-07-08 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images golang1.25-1.25.12-0.1.hum1@aarch64, golang1.25-1.25.12-0.1.hum1@src, golang1.25-1.25.12-0.1.hum1@x86_64 +10
  • RHSA-2026:36477 Released 2026-07-08 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images golang1.26-1.26.5-0.1.hum1@aarch64, golang1.26-1.26.5-0.1.hum1@src, golang1.26-1.26.5-0.1.hum1@x86_64 +10

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
ExternalDNS OperatorAffectedNo fix yet
File Integrity OperatorAffectedNo fix yet
Logging Subsystem for Red Hat OpenShiftAffectedNo fix planned: Will not fix
Multicluster Engine for KubernetesAffectedNo fix yet
Red Hat Advanced Cluster Management for Kubernetes 2AffectedNo fix yet
Red Hat Ceph Storage 7AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat OpenShift Container Platform 5AffectedNo fix yet
Red Hat OpenShift Virtualization 4AffectedNo fix yet
Cert Manager support for Red Hat OpenShift release 1.18Fixed RHSA-2026:82347, RHSA-2026:82354, RHSA-2026:82372
Cluster Observability Operator 1.5Fixed RHSA-2026:95081, RHSA-2026:95591
OpenShift Compliance Operator 1Fixed RHSA-2026:95612
Red Hat Advanced Cluster Security 4.9Fixed RHSA-2026:59202
Red Hat Advanced Cluster Security for Kubernetes 4.11Fixed RHSA-2026:48891
Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10Fixed RHSA-2026:59203
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:37436, RHSA-2026:38494
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:38995
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:37435, RHSA-2026:38493, RHSA-2026:38878
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:61253
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:57649
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:49702
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:49712
Red Hat Hardened ImagesFixed RHSA-2026:36477, RHSA-2026:36510
Red Hat OpenShift AI 3.4Fixed RHSA-2026:91248
Red Hat OpenShift AI 3.5Fixed RHSA-2026:91249
Red Hat OpenShift Container Platform 4.20Fixed RHSA-2026:66375
Red Hat OpenShift Container Platform 4.21Fixed RHSA-2026:66350
Red Hat OpenShift Container Platform 4.22Fixed RHSA-2026:57361
Red Hat OpenShift distributed tracing 3.10.1Fixed RHSA-2026:44624, RHSA-2026:54773
Red Hat Quay 3.10Fixed RHSA-2026:53520
Red Hat Quay 3.12Fixed RHSA-2026:52968
Red Hat Quay 3.14Fixed RHSA-2026:70267
Red Hat Quay 3.16Fixed RHSA-2026:69255
Red Hat Quay 3.17Fixed RHSA-2026:74511
Red Hat Quay 3.9Fixed RHSA-2026:50931
multicluster engine for Kubernetes 2.8Fixed RHSA-2026:92303
Not affected: 86 products
  • Assisted Installer for Red Hat OpenShift Container Platform 2
  • Builds for Red Hat OpenShift
  • Cluster Observability Operator 1.5
  • Compliance Operator
  • Confidential Compute Attestation
  • Cryostat 4
  • Custom Metric Autoscaler operator for Red Hat Openshift
  • Deployment Validation Operator
  • External Secrets Operator for Red Hat OpenShift
  • Fence Agents Remediation Operator
  • File Integrity Operator
  • Gatekeeper 3
  • Ironic content for Red Hat OpenShift Container Platform 4.22
  • Logging Subsystem for Red Hat OpenShift
  • Logical Volume Manager Storage
  • Machine Deletion Remediation Operator
  • Migration Toolkit for Applications 8
  • Migration Toolkit for Containers
  • Multiarch Tuning Operator
  • Multicluster Engine for Kubernetes
  • Multicluster Global Hub
  • Network Observability Operator
  • Node HealthCheck Operator
  • OpenShift API for Data Protection
  • OpenShift Compliance Operator 1
  • OpenShift Developer Tools and Services
  • OpenShift Lightspeed
  • OpenShift Pipelines
  • OpenShift Serverless
  • OpenShift Service Mesh 3
  • OpenShift Source-to-Image (S2I)
  • Power monitoring for Red Hat OpenShift
  • Red Hat 3scale API Management Platform 2
  • Red Hat AMQ Clients
  • Red Hat Advanced Cluster Management for Kubernetes 2
  • Red Hat Advanced Cluster Security 4.9
  • Red Hat Advanced Cluster Security for Kubernetes 4.11
  • Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ceph Storage 5
  • Red Hat Ceph Storage 6
  • Red Hat Ceph Storage 9
  • Red Hat Connectivity Link 1
  • Red Hat Developer Hub 1
  • Red Hat Edge Manager 1
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images
  • Red Hat Lightspeed for Runtimes Operator
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift Cluster Manager CLI
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 4.21
  • Red Hat OpenShift Container Platform 4.22
  • Red Hat OpenShift Container Platform 5
  • Red Hat OpenShift Dev Spaces
  • Red Hat OpenShift Dev Workspaces Operator
  • Red Hat OpenShift GitOps
  • Red Hat OpenShift Virtualization 4
  • Red Hat OpenShift distributed tracing 3.10.1
  • Red Hat OpenShift for Windows Containers
  • Red Hat OpenShift on AWS
  • Red Hat OpenStack Platform 16.2
  • Red Hat OpenStack Platform 17.1
  • Red Hat OpenStack Platform 18.0
  • Red Hat Openshift Data Foundation 4
  • Red Hat Quay 3.10
  • Red Hat Quay 3.12
  • Red Hat Quay 3.14
  • Red Hat Quay 3.16
  • Red Hat Quay 3.17
  • Red Hat Quay 3.9
  • Red Hat Satellite 6
  • Red Hat Service Interconnect 2
  • Red Hat Trusted Artifact Signer
  • Red Hat Web Terminal
  • Security Profiles Operator
  • Service Telemetry Framework 1.5
  • Zero Trust Workload Identity Manager
  • Zero Trust Workload Identity Manager - Tech Preview
  • mirror registry for Red Hat OpenShift 2
  • multicluster engine for Kubernetes 2.8
  • streams for Apache Kafka 2
  • streams for Apache Kafka 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-39822
  2. 2026-10-03 Alias added: GHSA-xcgv-8mv7-v8c7
  3. 2026-10-14 Fix available: RHSA-2026:82372 · Red Hat
  4. 2026-10-14 Fix available: RHSA-2026:82354 · Red Hat
  5. 2026-10-14 Fix available: RHSA-2026:82347 · Red Hat
  6. 2026-10-15 Fix available: Cert Manager support for Red Hat OpenShift release 1.18 · Red Hat
  7. 2026-10-22 Fix available: Red Hat Advanced Cluster Security for Kubernetes for IBM Z and LinuxONE 4.11 · Red Hat
  8. 2026-10-27 Affected versions changed · Red Hat
  9. 2026-10-30 Fix available: RHSA-2026:91248 · Red Hat
  10. 2026-10-30 Fix available: RHSA-2026:91249 · Red Hat
  11. 2026-10-30 Fix available: RHSA-2026:92303 · Red Hat
  12. 2026-10-30 Fix available: Red Hat OpenShift AI 3.4, Red Hat OpenShift AI 3.5, multicluster engine for Kubernetes 2.8 · Red Hat
  13. 2026-10-30 Affected versions changed · Red Hat
  14. 2026-10-31 Fix available: Red Hat Advanced Cluster Security for Kubernetes 4.11, Red Hat OpenShift distributed tracing 3.10.1 · Red Hat
  15. 2026-11-04 Fix available: RHSA-2026:95081 · Red Hat
  16. 2026-11-04 Fix available: Cluster Observability Operator 1.5, Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10 · Red Hat
  17. 2026-11-06 Fix available: OpenShift Compliance Operator 1 · Red Hat
  18. 2026-11-06 Fix available: RHSA-2026:95591 · Red Hat
  19. 2026-11-06 Fix available: RHSA-2026:95612 · Red Hat

References

Patch 3

Advisory 1

  • TI-2020-00578 Improper certificate validation in Microsoft Windows KEVCVSS 3.1HIGH 8.1
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2018-05208 The "go get" implementation in Go 1.9.4, when the -insecure command-line option is used… CVSS 3.1HIGH 8.8
  • TI-2018-12083 Improper input validation in [UNKNOWN] golang CVSS 3.1HIGH 8.1
  • TI-2024-16306 Mishandling of corrupt central directory record in archive/zip CVSS 3.1MEDIUM 5.5
  • TI-2021-15910 Go before 1.16.9 and 1.17.x before 1.17.2 has a Buffer Overflow via large arguments in a… CVSS 3.1CRITICAL 9.8
See all 170 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences