go-git: Maliciously crafted idx file can cause asymmetric memory consumption
Priority LOW 22CWE-191Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 41 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-191 and the CVSS impact.
Summary
go-git is an extensible git implementation library written in pure Go. From version 5.0.0 to before version 5.17.1, a vulnerability has been identified in which a maliciously crafted .idx file can cause asymmetric memory consumption, potentially exhausting available memory and resulting in a denial-of-service (DoS) condition. Exploitation requires write access to the local repository's .git directory, it order to create or alter existing .idx files. This issue has been patched in version 5.17.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00153 4th percentileScored 2026-11-07
Fix Partial go-git (go-git): 5.17.1github.com/go-git/go-git/v5 (Go): 5.17.1Red Hat: 41 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| go-git | go-git | 5.0.0 to before 5.17.1 | 5.17.1 | Patch available | CNA |
| — | github.com/go-git/go-git/v5 (Go) | 5.0.0 to before 5.17.1 | 5.17.1 | Patch available | GHSA-jhf3-xxhw-2wpp |
- go-git Vendorgo-git Affected 5.0.0 to before 5.17.1 Fixed in 5.17.1 Patch available CNA
- github.com/go-git/go-git/v5 (Go) Vendor— Affected 5.0.0 to before 5.17.1 Fixed in 5.17.1 Patch available GHSA-jhf3-xxhw-2wpp
Remediation
- Fix · CNA go-git (go-git) Fixed in 5.17.1
- Fix · GHSA-jhf3-xxhw-2wpp github.com/go-git/go-git/v5 (Go) Fixed in 5.17.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Assisted Installer for Red Hat OpenShift Container Platform 2 | Affected | No fix yet: Fix deferred |
| Builds for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Confidential Compute Attestation | Affected | No fix yet: Fix deferred |
| External Secrets Operator for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Kernel Module Management Operator for Red Hat Openshift | Affected | No fix yet: Fix deferred |
| Logging Subsystem for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Logical Volume Manager Storage | Affected | No fix yet: Fix deferred |
| Machine Deletion Remediation Operator | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Containers | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Virtualization | Affected | No fix yet: Fix deferred |
| Multicluster Engine for Kubernetes | Affected | No fix yet: Fix deferred |
| Network Observability Operator | Affected | No fix yet: Fix deferred |
| Node HealthCheck Operator | Affected | No fix yet: Fix deferred |
| OpenShift API for Data Protection | Affected | No fix yet: Fix deferred |
| OpenShift Developer Tools and Services | Affected | No fix yet: Fix deferred |
| OpenShift Pipelines | Affected | No fix yet: Fix deferred |
| OpenShift Serverless | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 2 | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 3 | Affected | No fix yet: Fix deferred |
| Pen Drive Powered by Red Hat Lightspeed | Affected | No fix yet: Fix deferred |
| Power monitoring for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Red Hat AI Inference Server | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Security 4 | Affected | No fix yet: Fix deferred |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Build of Kueue | Affected | No fix yet: Fix deferred |
| Red Hat Edge Manager 1 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Workspaces Operator | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift GitOps | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift for Windows Containers | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 16.2 | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 17.1 | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 18.0 | Affected | No fix yet: Fix deferred |
| Red Hat Openshift Data Foundation 4 | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Artifact Signer | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34165
- 2026-10-03 Alias added: GHSA-jhf3-xxhw-2wpp
References
More Go-git vulnerabilities
- TI-2023-27070 Maliciously crafted Git server replies can lead to path traversal and RCE on go-git clients CVSS 3.1CRITICAL 9.8
- TI-2025-15573 go-git has an Argument Injection via the URL field CVSS 4.0CRITICAL 9.2
- TI-2025-15574 go-git clients vulnerable to DoS via maliciously crafted Git server replies CVSS 3.1HIGH 7.5
- TI-2023-27069 Maliciously crafted Git server replies can cause DoS on go-git clients CVSS 3.1HIGH 7.5
- TI-2026-30091 go-git Credential leak via cross-host redirect in smart HTTP transport CVSS 3.1HIGH 7.4
- TI-2026-32877 go-git: Improper parsing of specially crafted objects may lead to inconsistent interpretation compared to upstream Git CVSS 4.0HIGH 7.0
Sources
- CVE-2026-34165 · CVE Program
- CVE-2026-34165 · NVD
- FIRST EPSS
- GHSA-jhf3-xxhw-2wpp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-34165 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences