CVE-2026-84303

CVE-2026-84303 affects gRPC-Go (the Go implementation of gRPC). The xDS RBAC HTTP filter (internal/xds/httpfilter/rbac/rbac.go) fails to lowercase header matcher names in normalizeHeaderMatcher, while incoming metadata keys are already lowercase. A DENY policy using a mixed-case name (e.g., X-Rol...

CVE-2026-84303 gRPC-Go: xDS RBAC HTTP Filter bypass via mixed-case Header Matching and gRFC A41 validation evasion

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, the xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go does not lowercase header matcher names in normalizeHeaderMatcher even though incoming metadata keys are lowercase. A DENY policy using a mixed-case name such as...

Security Bulletin: IBM Storage Fusion Data Foundation is vulnerable to Authorization Bypass.

Summary google.golang.org/grpc is used by IBM Storage Fusion Data Foundation, which could allow Authorization Bypass. CVE-2026-33186. Vulnerability Details CVEID:CVE-2026-33186 DESCRIPTION: gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass...

PT-2026-84376

Name of the Vulnerable Software and Affected Versions gRPC-Go versions prior to 1.83.1 Description The xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go fails to lowercase header matcher names within the normalizeHeaderMatcher function, despite incoming metadata keys being lowercase...

CVE-2026-84304: Uncontrolled Resource Consumption

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connectio...

CVE-2026-84303: Improper Handling of Case Sensitivity

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, the xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go does not lowercase header matcher names in normalizeHeaderMatcher even though incoming metadata keys are lowercase. A DENY policy using a mixed-case name such as...

Security update for helm

This update for helm fixes the following issues: CVE-2026-41178: go.opentelemetry.io/otel/baggage,go.opentelemetry.io/otel/propagation: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs bsc1276510. CVE-2026-63308: processing zero-length byte slices in...

SUSE-SU-2026:3882-1 Security update for helm

This update for helm fixes the following issues: - CVE-2026-41178: go.opentelemetry.io/otel/baggage,go.opentelemetry.io/otel/propagation: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs bsc1276510. - CVE-2026-63308: processing zero-length byte slices in...

google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation

A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 :path pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed :path that omits the mandato...

Important: Red Hat Security Advisory: osbuild-composer security update

An update for osbuild-composer is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity ratin...

RHEL 9 : osbuild-composer (RHSA-2026:61245)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:61245 advisory. A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building...

Important: Red Hat Security Advisory: osbuild-composer security update

An update for osbuild-composer is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity ratin...

google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation

A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 :path pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed :path that omits the mandato...

PT-2026-84378

Name of the Vulnerable Software and Affected Versions gRPC-Go versions prior to 1.83.1 Description An unauthenticated remote attacker can cause a remote Denial of Service DoS by initiating a gRPC stream and fragmenting the payload into millions of small HTTP/2 DATA frames. In the...

Security Advisory 0146

Security Advisory 0146 PDF Date: August 19, 2026 Revision | Date | Changes ---|---|--- 1.0 | August 19, 2026 | Initial release Description Arista Networks is providing this security update in response to the following list of gRPC-go security vulnerabilities posted by Google at...

RHEL 9 : osbuild-composer (RHSA-2026:56959)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:56959 advisory. A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building images for...

MiracleLinux 8 : osbuild-composer-101.5-1.el8_10.ML.1 (AXSA:2026-1558:08)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1558:08 advisory. google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation CVE-2026-33186...

Unity Linux 20.1070a Security Update: osbuild-composer (UTSA-2026-101351)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-101351 advisory. gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 :pat...

google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation

A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 :path pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed :path that omits the mandato...

google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation

A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 :path pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed :path that omits the mandato...