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Fencer Intel
medium 6.5

CVE-2026-44740 json

go-billy: Lack of depth and cycle detection in symlink resolution may lead to infinite loops and resource exhaustion

published 5mo ago modified last mo. also GHSA-m3xc-h892-ggx6 , GO-2026-5490 , EUVD-2026-33663

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

Billy is an interface filesystem abstraction for Go. Prior to versions 5.9.0 and 6.0.0-alpha.1, multiple components may improperly handle crafted or malformed input, resulting in panics, infinite loops, uncontrolled recursion, or excessive resource consumption. These issues arise from insufficient validation and missing safety mechanisms such as cycle detection, recursion limits, or defensive handling of unexpected states when processing untrusted repository data and filesystem structures. This issue has been patched in versions 5.9.0 and 6.0.0-alpha.1.

Patch / fix

  • go github.com/go-git/go-billy/v5 5.9.0
  • go github.com/go-git/go-billy/v6 6.0.0-alpha.1
  • golang-github-go-git-go-billy Debian 14 5.9.0-1
  • golang-github-go-git-go-billy-v6 Debian 14 6.0.0~alpha.1-1

debian advisories DEBIAN-CVE-2026-44740

  • flightctl edge manager 1.1 1.1.4-1.el10em
  • flightctl edge manager 1.1 1.1.4-1.el9em
  • flightctl-cli edge manager 1.1 1.1.4-1.el10em
  • flightctl-cli edge manager 1.1 1.1.4-1.el9em
  • flightctl-agent edge manager 1.1 1.1.4-1.el10em
  • flightctl-agent edge manager 1.1 1.1.4-1.el9em
  • flightctl edge manager 1.2 1.2.1-1.el10
  • flightctl edge manager 1.2 1.2.1-1.el9

red hat advisories RHSA-2026:68334RHSA-2026:68335RHSA-2026:46391RHSA-2026:35111RHSA-2026:32974RHSA-2026:32963

  • terraform-provider-aws SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.11.0-150200.6.29.2
  • terraform-provider-tls SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.0.0-150200.5.26.2
  • terraform-provider-helm SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 2.9.0-150200.6.34.2
  • terraform-provider-null SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.0.0-150200.6.32.2
  • terraform-provider-local SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 2.0.0-150200.6.30.2
  • terraform-provider-google SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.43.0-150200.6.23.2
  • terraform-provider-random SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.0.0-150200.6.26.2
  • terraform-provider-azurerm SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 2.32.0-150200.6.23.2

suse advisories SUSE-SU-2026:4628-1SUSE-SU-2026:23216-1SUSE-SU-2026:23227-1SUSE-SU-2026:3056-1SUSE-SU-2026:2824-1SUSE-SU-2026:22575-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260727T201416-160000.1.1
  • rclone openSUSE Leap 16.0 1.74.4-bp160.1.1
  • alloy openSUSE Leap 16.0 1.17.0-160000.1.1
  • trivy openSUSE Leap 16.0 0.71.2-160000.1.1
  • alloy openSUSE Tumbleweed 1.17.0-1.1
  • amazon-ssm-agent openSUSE Leap 16.0 3.3.4624.0-160000.1.1
  • trivy openSUSE Leap 16.0 0.71.0-160000.1.1
  • git-bug openSUSE Tumbleweed 0.10.1-6.1

opensuse advisories openSUSE-SU-2026:21551-1openSUSE-SU-2026:21436-1openSUSE-SU-2026:21251-1openSUSE-SU-2026:21072-1openSUSE-SU-2026:11053-1openSUSE-SU-2026:21079-1

  • grafana AlmaLinux 8 9.2.10-32.el8_10
  • grafana-selinux AlmaLinux 8 9.2.10-32.el8_10

almalinux advisories ALSA-2026:46391

  • grafana Rocky Linux 8 9.2.10-32.el8_10

rocky linux advisories RLSA-2026:46391

Is CVE-2026-44740 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2026-44740 updated cvss 7.5

github.com/go-git/go-billy: Billy: Denial of Service via crafted input due to insufficient validation

  • Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 assisted/agent-preinstall-image-builder-rhel9 Red Hat Builds for Red Hat OpenShift openshift-builds/openshift-builds-waiters-rhel9, openshift-builds/openshift-builds-webhook-rhel9, openshift-builds/openshift-builds-controller-rhel9, openshift-builds/openshift-builds-git-cloner-rhel9, openshift-builds/openshift-builds-image-bundler-rhel9, openshift-builds/openshift-builds-image-processing-rhel9
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-must-gather-rhel9
    affected: workaround, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Exploit Intelligence exploit-intelligence-tech-preview/agent-client-rhel9, exploit-intelligence-tech-preview/vulnerability-analysis-rhel9
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat External Secrets Operator for Red Hat OpenShift external-secrets-operator/bitwarden-sdk-server-rhel9, external-secrets-operator/external-secrets-operator-rhel9, external-secrets-operator/external-secrets-operator-bundle
    affected: workaround, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Kernel Module Management Operator for Red Hat Openshift kmm/kernel-module-management-must-gather-rhel9 Red Hat Machine Deletion Remediation Operator workload-availability/machine-deletion-remediation-rhel9-operator, workload-availability/machine-deletion-remediation-operator-bundle
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Migration Toolkit for Virtualization mtv-candidate/mtv-must-gather-rhel8, migration-toolkit-virtualization/mtv-must-gather-rhel9
    affected: workaround, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Multicluster Engine for Kubernetes multicluster-engine/must-gather-rhel9, multicluster-engine/assisted-service-8-rhel8, multicluster-engine/assisted-service-9-rhel9, multicluster-engine/assisted-installer-controller-rhel9
    affected: workaround, no fix available, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift Developer Tools and Services ocp-tools-4/jenkins-agent-base-rhel8 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-agentic-sandbox-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-resolvers-rhel8 Red Hat OpenShift Serverless openshift-serverless-clients, openshift-serverless-1/kn-client-kn-rhel9, openshift-serverless-1/serverless-must-gather-rhel9, openshift-serverless-1/kn-plugin-func-func-util-rhel9
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
show 20 more
  • Red Hat OpenShift Service Mesh 2 openshift-service-mesh/istio-must-gather-rhel9
    affected: workaround, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Power monitoring for Red Hat OpenShift openshift-power-monitoring/power-monitoring-rhel9-operator Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-scanner-rhel8, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-scanner-v4-rhel8, advanced-cluster-security/rhacs-scanner-slim-rhel8
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat AI Inference Server rhaiis/vllm-cpu-rhel9, rhaiis/vllm-tpu-rhel9 Red Hat Ansible Automation Platform 2 ansible-automation-platform-25/aap-must-gather-rhel8
    affected: workaround, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Ceph Storage 9 rhceph/alloy-rhel10
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Developer Hub 1 rhdh/rhdh-must-gather-rhel9
    affected: workaround, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-pipeline-runtime-minimal-cpu-py312-rhel9, rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9, rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9, rhoai/odh-workbench-jupyter-minimal-cpu-py312-rhel9, rhoai/odh-data-science-pipelines-argo-argoexec-rhel9, rhoai/odh-workbench-jupyter-minimal-cuda-py312-rhel9, +13 more Red Hat OpenShift Container Platform 4 openshift-kni/commatrix, openshift4/cnf-tests-rhel8, openshift4/cnf-tests-rhel9, openshift4/ose-dpu-cni-rhel9, openshift4/ose-dpu-daemon-rhel9, openshift4/ose-olm-rukpak-rhel8, +13 more Red Hat OpenShift Container Platform 5 openshift-kni/commatrix, openshift5/cnf-tests-rhel9, openshift5/ose-console-rhel9, openshift5/ose-dpu-cni-rhel9, openshift5/ose-dpu-daemon-rhel9, openshift5/ose-dpu-rhel9-operator, +9 more
    affected: workaround, no fix available, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat OpenShift Dev Workspaces Operator devworkspace/devworkspace-rhel9-operator, devworkspace/devworkspace-operator-bundle, devworkspace/devworkspace-project-clone-rhel9
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9, openshift-gitops-1/gitops-rhel8, openshift-gitops-1/gitops-rhel9, openshift-gitops-1/must-gather-rhel8, openshift-gitops-1/must-gather-rhel9, +2 more
    affected: workaround, no fix available, no fix planned “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat OpenStack Platform 16.2 rhosp-rhel8/osp-director-agent, rhosp-rhel8/osp-director-operator Red Hat OpenStack Platform 17.1 rhosp-rhel9/osp-director-agent, rhosp-rhel9/osp-director-operator Red Hat Trusted Artifact Signer rhtas/ec-rhel9
    affected: workaround, no fix available “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+”
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/perses-rhel9 1787593946, cluster-observability-operator/perses-rhel9-operator 1787593697
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:61314
  • Red Hat external secrets operator for Red Hat OpenShift 1.1 external-secrets-operator/external-secrets-rhel9 1786614676
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:54525
  • Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine/cluster-image-set-controller-rhel9 1784646786
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:47735
  • Red Hat multicluster engine for Kubernetes 2.9 multicluster-engine/cluster-image-set-controller-rhel9 1786764601
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:59559
  • Red Hat multicluster engine for Kubernetes 2.10 multicluster-engine/cluster-image-set-controller-rhel9 1784646026
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:46885
  • Red Hat multicluster engine for Kubernetes 2.11 multicluster-engine/cluster-image-set-controller-rhel9 1786911957
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:57194
  • Red Hat multicluster engine for Kubernetes 2.17 multicluster-engine/cluster-image-set-controller-rhel9 1786983362
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:59593
  • Red Hat OpenShift API for Data Protection 1.3 oadp/oadp-mustgather-rhel9 1785177359
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:51033
  • Red Hat OpenShift API for Data Protection 1.4 oadp/oadp-mustgather-rhel9 1786946294
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:59467
  • Red Hat OpenShift API for Data Protection 1.5 oadp/oadp-mustgather-rhel9 1788859896
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:66022
  • Red Hat Advanced Cluster Management for Kubernetes 2.11 rhacm2/multicluster-operators-subscription-rhel9 1787263584
    fixed: vendor fix “To mitigate the issue, we suggest upgrading to versions 5.9.0+ or 6.0.0-alpha.1+” RHSA-2026:60387

26 more fixed, 55 more not affected 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
no
Technical impact
partial
Assessed
5mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/go-git/go-billy/v5
<5.9.0
5.9.0
go github.com/go-git/go-billy/v6
<6.0.0-alpha.1
6.0.0-alpha.1

Affected products

  • go-git go-billy

Classification

Weakness
  • CWE-674 Uncontrolled Recursion
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Intel 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.