Improper access control in github.com/gorilla/handlers
Priority MEDIUM 50CWE-346Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-346.
Summary
Usage of the CORS handler may apply improper CORS headers, allowing the requester to explicitly control the value of the Access-Control-Allow-Origin header, which bypasses the expected behavior of the Same Origin Policy.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00765 55th percentileScored 2026-11-07
Fix Partial github.com/gorilla/handlers (github.com/gorilla/handlers): 1.3.0github.com/gorilla/handlers (Go): 1.3.0Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| github.com/gorilla/handlers | github.com/gorilla/handlers | before 1.3.0 | 1.3.0 | Patch available | CNA |
| — | github.com/gorilla/handlers (Go) | before 1.3.0 | 1.3.0 | Patch available | GHSA-jcr6-mmjj-pchw |
- github.com/gorilla/handlers Vendorgithub.com/gorilla/handlers Affected before 1.3.0 Fixed in 1.3.0 Patch available CNA
- github.com/gorilla/handlers (Go) Vendor— Affected before 1.3.0 Fixed in 1.3.0 Patch available GHSA-jcr6-mmjj-pchw
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gorillatoolkit:handlers:*:*:*:*:*:go:*:* | before 1.3.0 | Vulnerable | Gorillatoolkit |
- cpe:2.3:a:gorillatoolkit:handlers:*:*:*:*:*:go:*:* Versions before 1.3.0 Vulnerable ·Gorillatoolkit
Remediation
- Fix · CNA github.com/gorilla/handlers (github.com/gorilla/handlers) Fixed in 1.3.0
- Fix · GHSA-jcr6-mmjj-pchw github.com/gorilla/handlers (Go) Fixed in 1.3.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 3.11 | Affected | No fix planned: Out of support scope |
Not affected: 22 products
- Logging Subsystem for Red Hat OpenShift
- Migration Toolkit for Containers
- OpenShift API for Data Protection
- OpenShift Developer Tools and Services
- OpenShift Serverless
- Red Hat 3scale API Management Platform 2
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Advanced Cluster Security 3
- Red Hat Ansible Automation Platform 1.2
- Red Hat Ceph Storage 5
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 3.11
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform Assisted Installer 1
- Red Hat OpenShift GitOps
- Red Hat OpenShift distributed tracing 2
- Red Hat OpenStack Platform 16.2
- Red Hat Openshift Container Storage 4
- Red Hat Openshift Data Foundation 4
- Red Hat Openshift Sandboxed Containers
- Red Hat Quay 3
Timeline
- 2026-10-02 Threatist record created from CVE-2017-20146
- 2026-10-03 Alias added: GHSA-jcr6-mmjj-pchw
References
Sources
- CVE-2017-20146 · CVE Program
- CVE-2017-20146 · NVD
- FIRST EPSS
- GHSA-jcr6-mmjj-pchw · GitHub Advisory Database · CC BY 4.0
- CVE-2017-20146 · 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