> CVE-2026-84445 [HIGH]

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PUBLISHED
2026-09-14 17:17
MODIFIED
2026-09-14 17:17
CVSS_SCORE V3
8.7
EPSS (Prob. Exploit)
0.64%
Top 50.3%
DATA SOURCES:
NVD 🔗 2026-09-14 RED HAT 🔗 2026-09-20 CWE MITRE 🔗 2026-10-01 FIRST EPSS 🔗 2026-10-18 GITHUB 🔗 2026-09-24 OSV 🔗 2026-10-26 MSRC 🔗 2026-09-18

> DESCRIPTION

gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProcess in internal/xds/server/routing.go assumes that an authority value exists and indexes the empty slice. A remote client that can complete transport connection establishment can trigger an index-out-of-bounds panic that is not recovered by the per-RPC goroutine and terminates the entire server process. In insecure or ordinary TLS deployments the request can be unauthenticated, while strict mTLS or ALTS deployments require valid transport credentials before the malformed RPC can reach the interceptor. This issue is fixed in versions 1.82.2 and 1.83.2.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-129 CWE-248

> CWE DETAILED DESCRIPTIONS

CWE-129: Improper Validation of Array Index - The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. | CWE-248: Uncaught Exception - An exception is thrown from a function, but it is not caught.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Network Observability 1.12.3 for OpenShift
Network Observability 1.12 for Red Hat OpenShift.
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cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: rhc security update
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Red Hat Security Advisory: multicluster engine for Kubernetes v2.10.7 security update
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Red Hat Security Advisory: multicluster engine for Kubernetes v2.11.7 security update
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Red Hat Security Advisory: Helm CLI for Red Hat OpenShift v4.3.0 release
General availability release of Helm CLI for Red Hat OpenShift v4.3.0.
Red Hat Security Advisory: RHACS 4.10.9 security and bug fix update
Updated images are now available for Red Hat Advanced Cluster Security (RHACS), which typically include new features, bug fixes, and/or security patches.
Red Hat Security Advisory: RHOAI 3.3.7 - Red Hat OpenShift AI
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Red Hat Security Advisory: rhc security update
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Red Hat Security Advisory: Red Hat Lightspeed (formerly Insights) for Runtimes security update
An update is now available for Red Hat Lightspeed (formerly Insights) for Runtimes on RHEL 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnera...
Red Hat Security Advisory: Cluster Observability Operator 1.5.3
The Cluster Observability Operator (COO) is a Red Hat OpenShift Container Platform Operator that you can deploy to manage observability component stacks by using custom resource descriptions (CRDs).
Red Hat Security Advisory: rhc-worker-script security update
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Red Hat Security Advisory: opentelemetry-collector security update
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An updated OpenShift Security Profiles Operator image that fixes various bugs and adds new enhancements is now available for the Red Hat OpenShift Enterprise 4 catalog.
Red Hat Security Advisory: opentelemetry-collector security update
An update for opentelemetry-collector is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability...
Red Hat Security Advisory: Red Hat Developer Hub 1.10.5 release.
Red Hat Developer Hub 1.10.5 has been released.
Red Hat Security Advisory: RHACS 4.11.5 security and bug fix update
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Red Hat Security Advisory: Helm CLI for Red Hat OpenShift 4.3.0 container image release
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Red Hat Security Advisory: opentelemetry-collector security update
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Red Hat Security Advisory: opentelemetry-collector security update
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Red Hat Security Advisory: opentelemetry-collector security update
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Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
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Red Hat Security Advisory: RHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
The 1.4.4 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHTAS 1.0.3 - GA Release Of the Policy Controller Operator
The GA release of the RHTAS Policy Controller Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4
Red Hat Security Advisory: DevWorkspace Operator 1.0.0 release.
DevWorkspace Operator 1.0.0 has been released.
Red Hat Security Advisory: RHOAI 3.4.5 - Red Hat OpenShift AI
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Red Hat Security Advisory: Migration Toolkit for Containers (MTC) 1.8.18 security and bug fix update
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Red Hat OpenShift Builds 1.9.2
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Red Hat OpenShift Builds 1.9.2
Red Hat Security Advisory: Red Hat OpenShift Builds 1.8.3
Red Hat OpenShift Builds 1.8.3

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-2v4p-qf9q-27wj HIGH

gRPC-Go xDS servers: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers

AFFECTED PACKAGES:
GO / google.golang.org/grpc
>= 1.84.0-dev, < 1.85.0-dev.0.20260825072537-93e31b48545e
Fixed in: 1.85.0-dev.0.20260825072537-93e31b48545e
GO / google.golang.org/grpc
>= 1.83.0, < 1.83.2
Fixed in: 1.83.2
GO / google.golang.org/grpc
< 1.82.2
Fixed in: 1.82.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers

AFFECTED PACKAGES:
Unknown / Unknown
84 versions affected
ALIASES:
GHSA-2v4p-qf9q-27wj, GO-2026-6443

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/09/2026 17:17
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-129: Improper Validation of Array Index - The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure ...
📊 ENRICHISSEMENT 20/09/2026 05:02
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/09/2026 05:02
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/grpc/grpc-go/commit/3822494d8ea03b992c089fd2a195f041762fffb7
https://github.com/grpc/grpc-go/commit/8668b69c167df908b6b3666dcbf40992b9e932a4
https://github.com/grpc/grpc-go/commit/93e31b48545e2a8aaeb6e06b47fb249f94e6297f
https://github.com/grpc/grpc-go/issues/9354
https://github.com/grpc/grpc-go/pull/9365
https://github.com/grpc/grpc-go/pull/9366
https://github.com/grpc/grpc-go/pull/9367
https://github.com/grpc/grpc-go/releases/tag/v1.82.2
https://github.com/grpc/grpc-go/releases/tag/v1.83.2
https://github.com/grpc/grpc-go/security/advisories/GHSA-2v4p-qf9q-27wj
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