ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil
Priority LOW 30Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Partial Red Hat: 20 fixed, 67 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0039 33rd percentileScored 2026-11-07
Fix Partial net/http/httputil (Go standard library): 1.25.10, 1.26.3Red Hat: 22 advisoriesRed Hat: 20 fixed, 67 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 standard library | net/http/httputil | before 1.25.10; 1.26.0-0 to before 1.26.3 | 1.25.10, 1.26.3 | Patch available | CNA |
- net/http/httputil VendorGo standard library Affected before 1.25.10; 1.26.0-0 to before 1.26.3 Fixed in 1.25.10, 1.26.3 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* | before 1.25.10; 1.26.0 to before 1.26.3 | Vulnerable | Go standard library |
- cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* Versions before 1.25.10; 1.26.0 to before 1.26.3 Vulnerable ·Go standard library
Remediation
- Fix · CNA net/http/httputil (Go standard library) Fixed in 1.25.10, 1.26.3
Red Hat 22 advisories
- RHSA-2026:92280 Released 2026-11-04 · Red Hat rating ImportantOpenShift Container Platform 4.19.54 bug fix and security update
- Red Hat OpenShift Container Platform 4.19 registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9, registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9 +47
- RHSA-2026:92994 Released 2026-11-03 · Red Hat rating ImportantOpenShift Container Platform 4.21.41 bug fix and security update
- Red Hat OpenShift Container Platform 4.21 registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9, registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9 +47
- RHSA-2026:91249 Released 2026-10-27 · Red Hat rating CriticalRed Hat AI Base Images 3.5.5 (Neuron)
- Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/base-image-neuron-rhel9
Show 19 more Red Hat advisories
- RHSA-2026:91248 Released 2026-10-27 · Red Hat rating CriticalRed Hat AI Base Images 3.4.6 (Neuron)
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-neuron-rhel9
- RHSA-2026:63096 Released 2026-09-08 · Red Hat rating ImportantOpenShift Container Platform 4.22.13 bug fix and security update
- Red Hat OpenShift Container Platform 4.22 registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9, registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/aws-node-termination-handler-rhel9 +47
- RHSA-2026:65121 Released 2026-09-08 · Red Hat rating ImportantRed Hat OpenShift Service Mesh 3.4.2
- Red Hat OpenShift Service Mesh 3.4 registry.redhat.io/openshift-service-mesh/istio-cni-rhel9, registry.redhat.io/openshift-service-mesh/istio-pilot-rhel9, registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9 +1
- RHSA-2026:65115 Released 2026-09-08 · Red Hat rating ImportantRed Hat OpenShift Service Mesh 3.3.7
- Red Hat OpenShift Service Mesh 3.3 registry.redhat.io/openshift-service-mesh/istio-cni-rhel9, registry.redhat.io/openshift-service-mesh/istio-pilot-rhel9, registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9 +1
- RHSA-2026:65113 Released 2026-09-08 · Red Hat rating ImportantRed Hat OpenShift Service Mesh 3.2.9
- Red Hat OpenShift Service Mesh 3.2 registry.redhat.io/openshift-service-mesh/istio-cni-rhel9, registry.redhat.io/openshift-service-mesh/istio-pilot-rhel9, registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9 +1
- RHSA-2026:65112 Released 2026-09-08 · Red Hat rating ImportantRed Hat OpenShift Service Mesh 3.1.12
- Red Hat OpenShift Service Mesh 3.1 registry.redhat.io/openshift-service-mesh/istio-cni-rhel9, registry.redhat.io/openshift-service-mesh/istio-pilot-rhel9, registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9 +1
- RHSA-2026:65106 Released 2026-09-08 · Red Hat rating ImportantRed Hat OpenShift Service Mesh 3.0.15
- Red Hat OpenShift Service Mesh 3.0 registry.redhat.io/openshift-service-mesh/istio-cni-rhel9, registry.redhat.io/openshift-service-mesh/istio-pilot-rhel9, registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9 +1
- RHSA-2026:61253 Released 2026-08-31 · Red Hat rating Importantgolang 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-2026:59556 Released 2026-08-25 · Red Hat rating Importantmulticluster engine for Kubernetes v2.11.6 security update
- multicluster engine for Kubernetes 2.11 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/cluster-curator-controller-rhel9, registry.redhat.io/multicluster-engine/cluster-image-set-controller-rhel9 +14
- RHSA-2026:57649 Released 2026-08-20 · Red Hat rating Importantgolang 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-2026:57194 Released 2026-08-19 · Red Hat rating Importantmulticluster engine for Kubernetes v2.11.5 security update
- multicluster engine for Kubernetes 2.11 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/backplane-rhel9-operator, registry.redhat.io/multicluster-engine/cluster-api-provider-kubevirt-rhel9 +11
- RHSA-2026:49712 Released 2026-08-03 · Red Hat rating Importantgolang 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 Importantgolang 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-2026:43692 Released 2026-07-22 · Red Hat rating ImportantRed Hat OpenShift API for Data Protection
- OpenShift API for Data Protection 1.6 registry.redhat.io/oadp/oadp-velero-rhel9
- RHSA-2026:23264 Released 2026-06-04 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images golang1.26-1.26.4-2.hum1@aarch64, golang1.26-1.26.4-2.hum1@src, golang1.26-1.26.4-2.hum1@x86_64 +10
- RHSA-2026:23262 Released 2026-06-04 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images golang1.25-1.25.11-2.hum1@aarch64, golang1.25-1.25.11-2.hum1@src, golang1.25-1.25.11-2.hum1@x86_64 +10
- RHSA-2026:22112 Released 2026-06-01 · Red Hat rating Importantgo-toolset:rhel8 security update
- Red Hat Enterprise Linux AppStream (v. 8) delve-1.25.2-1.module+el8.10.0+23746+9db33b5e.aarch64::go-toolset:rhel8, delve-1.25.2-1.module+el8.10.0+23746+9db33b5e.ppc64le::go-toolset:rhel8, delve-1.25.2-1.module+el8.10.0+23746+9db33b5e.src::go-toolset:rhel8 +22
- RHSA-2026:22121 Released 2026-06-01 · Red Hat rating Importantgolang security update
- Red Hat Enterprise Linux AppStream (v. 9) go-toolset-1.26.3-1.el9_8, golang-1.26.3-1.el9_8, golang-bin-1.26.3-1.el9_8 +5
- RHSA-2026:22120 Released 2026-06-01 · Red Hat rating Importantgolang security update
- Red Hat Enterprise Linux AppStream (v. 10) go-toolset-1.26.3-4.el10_2, golang-1.26.3-4.el10_2, golang-bin-1.26.3-4.el10_2 +5
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 |
| Compliance Operator | Affected | No fix yet: Fix deferred |
| Confidential Compute Attestation | Affected | No fix yet: Fix deferred |
| Cryostat 4 | Affected | No fix yet: Fix deferred |
| Custom Metric Autoscaler operator for Red Hat Openshift | Affected | No fix yet: Fix deferred |
| Deployment Validation Operator | Affected | No fix yet: Fix deferred |
| External Secrets Operator for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Fence Agents Remediation Operator | Affected | No fix yet: Fix deferred |
| File Integrity Operator | 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 |
| Migration Toolkit for Applications 8 | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Containers | Affected | No fix yet: Fix deferred |
| Multiarch Tuning Operator | Affected | No fix yet: Fix deferred |
| Multicluster Engine for Kubernetes | Affected | No fix yet: Fix deferred |
| Multicluster Global Hub | 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 Developer Tools and Services | Affected | No fix yet: Fix deferred |
| OpenShift Lightspeed | 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 3 | Affected | No fix yet |
| Power monitoring for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Red Hat 3scale API Management Platform 2 | 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 Ceph Storage 5 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 6 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 9 | Affected | No fix yet: Fix deferred |
| Red Hat Certification Program for Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Connectivity Link 1 | Affected | No fix yet: Fix deferred |
| Red Hat Developer Hub 1 | Affected | No fix yet: Fix deferred |
| Red Hat Edge Manager 1 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | 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 Lightspeed for Runtimes Operator | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Cluster Manager CLI | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Red Hat OpenShift Dev Spaces | 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 |
| Red Hat OpenShift distributed tracing 3 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift for Windows Containers | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift on AWS | 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 Quay 3 | Affected | No fix yet: Fix deferred |
| Red Hat Satellite 6 | Affected | No fix yet: Fix deferred |
| Red Hat Service Interconnect 1 | Affected | No fix yet: Fix deferred |
| Red Hat Service Interconnect 2 | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Artifact Signer | Affected | No fix yet: Fix deferred |
| Red Hat Web Terminal | Affected | No fix yet: Fix deferred |
| Security Profiles Operator | Affected | No fix yet: Fix deferred |
| Zero Trust Workload Identity Manager | Affected | No fix yet: Fix deferred |
| Zero Trust Workload Identity Manager - Tech Preview | Affected | No fix yet: Fix deferred |
| cert-manager Operator for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| streams for Apache Kafka 3 | Affected | No fix yet: Fix deferred |
| OpenShift API for Data Protection 1.6 | Fixed | RHSA-2026:43692 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:22120 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:22112 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:22121 |
| 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 Images | Fixed | RHSA-2026:23262, RHSA-2026:23264 |
| Red Hat OpenShift AI 3.4 | Fixed | RHSA-2026:91248 |
| Red Hat OpenShift AI 3.5 | Fixed | RHSA-2026:91249 |
| Red Hat OpenShift Container Platform 4.19 | Fixed | RHSA-2026:92280 |
| Red Hat OpenShift Container Platform 4.21 | Fixed | RHSA-2026:92994 |
| Red Hat OpenShift Container Platform 4.22 | Fixed | RHSA-2026:63096 |
| Red Hat OpenShift Service Mesh 3.0 | Fixed | RHSA-2026:65106 |
| Red Hat OpenShift Service Mesh 3.1 | Fixed | RHSA-2026:65112 |
| Red Hat OpenShift Service Mesh 3.2 | Fixed | RHSA-2026:65113 |
| Red Hat OpenShift Service Mesh 3.3 | Fixed | RHSA-2026:65115 |
| Red Hat OpenShift Service Mesh 3.4 | Fixed | RHSA-2026:65121 |
| multicluster engine for Kubernetes 2.11 | Fixed | RHSA-2026:57194, RHSA-2026:59556 |
Not affected: 11 products
- OpenShift API for Data Protection 1.6
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4.19
- Red Hat OpenShift Container Platform 4.21
- Red Hat OpenShift Container Platform 4.22
- Red Hat OpenShift Service Mesh 3.0
- Red Hat OpenShift Service Mesh 3.1
- Red Hat OpenShift Service Mesh 3.2
- Red Hat OpenShift Service Mesh 3.3
- Red Hat OpenShift Service Mesh 3.4
- multicluster engine for Kubernetes 2.11
Timeline
- 2026-10-02 Threatist record created from CVE-2026-39825
- 2026-10-03 Alias added: GHSA-h74g-238j-357m
- 2026-10-07 Affected versions changed · Red Hat
- 2026-10-27 Affected versions changed · Red Hat
- 2026-10-30 Fix available: RHSA-2026:91248 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:91249 · Red Hat
- 2026-10-30 Fix available: Red Hat OpenShift AI 3.4, Red Hat OpenShift AI 3.5 · Red Hat
- 2026-11-03 Fix available: RHSA-2026:92994 · Red Hat
- 2026-11-03 Fix available: Red Hat OpenShift Container Platform 4.21 · Red Hat
- 2026-11-04 Fix available: RHSA-2026:92280 · Red Hat
- 2026-11-04 Fix available: Red Hat OpenShift Container Platform 4.19 · Red Hat
References
More Go standard library Go vulnerabilities
- 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
Sources
- CVE-2026-39825 · CVE Program
- CVE-2026-39825 · NVD
- FIRST EPSS
- GHSA-h74g-238j-357m · GitHub Advisory Database · CC BY 4.0
- CVE-2026-39825 · 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