UBUNTU-CVE-2026-84303

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Source

https://ubuntu.com/security/CVE-2026-84303

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-84303

Upstream

CVE-2026-84303

Published

2026-09-01T19:17:00Z

Modified

2026-09-16T14:03:45Z

Severity

6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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 X-Role or User-Agent therefore does not match and fails open, allowing requests that should be rejected. The same case mismatch permits :Scheme or Grpc-Status to evade gRFC A41 validation and prevents Host from being rewritten to :authority. This issue is fixed in version 1.83.1.

References

Affected packages

Ubuntu:16.04:LTS

golang-google-grpc

Package

Name: golang-google-grpc
Purl: pkg:deb/ubuntu/golang-google-grpc?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.0~git20150514.0.f5ebd86-1

0.0~git20150514.0.f5ebd86-2

0.0~git20151002.0.3e7b7e5-1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "golang-google-grpc-dev",
            "binary_version":  "0.0~git20151002.0.3e7b7e5-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

grpc

Package

Name: grpc
Purl: pkg:deb/ubuntu/grpc?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.10.2-1

0.11.1-1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libgrpc0",
            "binary_version":  "0.11.1-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:18.04:LTS

golang-google-grpc

Package

Name: golang-google-grpc
Purl: pkg:deb/ubuntu/golang-google-grpc?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.4-1

1.6.0-2

1.6.0-3

1.6.0-3ubuntu0.18.04.1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "golang-google-grpc-dev",
            "binary_version":  "1.6.0-3ubuntu0.18.04.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

grpc

Package

Name: grpc
Purl: pkg:deb/ubuntu/grpc?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.3.2-1

1.3.2-1ubuntu1

1.3.2-1.1~build1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libgrpc++1",
            "binary_version":  "1.3.2-1.1~build1"
        },
        {
            "binary_name":  "libgrpc3",
            "binary_version":  "1.3.2-1.1~build1"
        },
        {
            "binary_name":  "protobuf-compiler-grpc",
            "binary_version":  "1.3.2-1.1~build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:20.04:LTS

golang-google-grpc

Package

Name: golang-google-grpc
Purl: pkg:deb/ubuntu/golang-google-grpc?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.22.1-1ubuntu1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "golang-google-grpc-dev",
            "binary_version":  "1.22.1-1ubuntu1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

grpc

Package

Name: grpc
Purl: pkg:deb/ubuntu/grpc?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.16.1-1

1.16.1-1ubuntu1

1.16.1-1ubuntu3

1.16.1-1ubuntu4

1.16.1-1ubuntu5

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libgrpc++1",
            "binary_version":  "1.16.1-1ubuntu5"
        },
        {
            "binary_name":  "libgrpc6",
            "binary_version":  "1.16.1-1ubuntu5"
        },
        {
            "binary_name":  "protobuf-compiler-grpc",
            "binary_version":  "1.16.1-1ubuntu5"
        },
        {
            "binary_name":  "python3-grpcio",
            "binary_version":  "1.16.1-1ubuntu5"
        },
        {
            "binary_name":  "ruby-grpc",
            "binary_version":  "1.16.1-1ubuntu5"
        },
        {
            "binary_name":  "ruby-grpc-tools",
            "binary_version":  "1.16.1-1ubuntu5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:22.04:LTS

golang-google-grpc

Package

Name: golang-google-grpc
Purl: pkg:deb/ubuntu/golang-google-grpc?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.29.1-0ubuntu1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "golang-google-grpc-dev",
            "binary_version":  "1.29.1-0ubuntu1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

google-guest-agent

Package

Name: google-guest-agent
Purl: pkg:deb/ubuntu/google-guest-agent?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

20210629.*

20210629.00-0ubuntu1

20210629.00-0ubuntu2

20220104.*

20220104.00-0ubuntu1

20220104.00-0ubuntu2

20220622.*

20220622.00-0ubuntu2~22.04.0

20220622.00-0ubuntu2~22.04.1

20230426.*

20230426.00-0ubuntu2~22.04.0

20231004.*

20231004.02-0ubuntu1~22.04.1

20231004.02-0ubuntu1~22.04.2

20231004.02-0ubuntu1~22.04.3

20231004.02-0ubuntu1~22.04.4

20231004.02-0ubuntu1~22.04.5

20240716.*

20240716.00-0ubuntu1~22.04.0

20241011.*

20241011.01-0ubuntu1~22.04.0

20250116.*

20250116.00-0ubuntu1~22.04.0

20250116.00-0ubuntu1~22.04.1

20250116.00-0ubuntu1~22.04.2

20250116.00-0ubuntu1~22.04.3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "google-guest-agent",
            "binary_version":  "20250116.00-0ubuntu1~22.04.3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

grpc

Package

Name: grpc
Purl: pkg:deb/ubuntu/grpc?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.30.2-3

1.30.2-3build1

1.30.2-3build3

1.30.2-3build5

1.30.2-3build6

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libgrpc++1",
            "binary_version":  "1.30.2-3build6"
        },
        {
            "binary_name":  "libgrpc10",
            "binary_version":  "1.30.2-3build6"
        },
        {
            "binary_name":  "protobuf-compiler-grpc",
            "binary_version":  "1.30.2-3build6"
        },
        {
            "binary_name":  "python3-grpcio",
            "binary_version":  "1.30.2-3build6"
        },
        {
            "binary_name":  "ruby-grpc",
            "binary_version":  "1.30.2-3build6"
        },
        {
            "binary_name":  "ruby-grpc-tools",
            "binary_version":  "1.30.2-3build6"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:24.04:LTS

google-guest-agent

Package

Name: google-guest-agent
Purl: pkg:deb/ubuntu/google-guest-agent?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

20230426.*

20230426.00-0ubuntu3

20231004.*

20231004.02-0ubuntu1

20231004.02-0ubuntu3

20240213.*

20240213.00-0ubuntu1

20240213.00-0ubuntu2

20240213.00-0ubuntu3

20240213.00-0ubuntu3.1

20240213.00-0ubuntu3.2

20240716.*

20240716.00-0ubuntu1~24.04.0

20240716.00-0ubuntu1~24.04.1

20241011.*

20241011.01-0ubuntu1~24.04.0

20250116.*

20250116.00-0ubuntu1~24.04.0

20250116.00-0ubuntu1~24.04.1

20250116.00-0ubuntu1~24.04.2

20250116.00-0ubuntu1~24.04.3

20250116.00-0ubuntu1~24.04.4

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "google-guest-agent",
            "binary_version":  "20250116.00-0ubuntu1~24.04.4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

grpc

Package

Name: grpc
Purl: pkg:deb/ubuntu/grpc?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.51.1-3build3

1.51.1-3build4

1.51.1-4

1.51.1-4build1

1.51.1-4build2

1.51.1-4.1build3

1.51.1-4.1build4

1.51.1-4.1build5

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libgrpc++1.51t64",
            "binary_version":  "1.51.1-4.1build5"
        },
        {
            "binary_name":  "libgrpc29t64",
            "binary_version":  "1.51.1-4.1build5"
        },
        {
            "binary_name":  "protobuf-compiler-grpc",
            "binary_version":  "1.51.1-4.1build5"
        },
        {
            "binary_name":  "python3-grpcio",
            "binary_version":  "1.51.1-4.1build5"
        },
        {
            "binary_name":  "ruby-grpc",
            "binary_version":  "1.51.1-4.1build5"
        },
        {
            "binary_name":  "ruby-grpc-tools",
            "binary_version":  "1.51.1-4.1build5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:26.04:LTS

golang-google-grpc

Package

Name: golang-google-grpc
Purl: pkg:deb/ubuntu/golang-google-grpc?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.64.0-7

1.66.3-2

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "golang-google-grpc-dev",
            "binary_version":  "1.66.3-2"
        },
        {
            "binary_name":  "protoc-gen-go-grpc",
            "binary_version":  "1.66.3-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

google-guest-agent

Package

Name: google-guest-agent
Purl: pkg:deb/ubuntu/google-guest-agent?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

20250506.*

20250506.01-0ubuntu1

20250506.01-0ubuntu2

20250506.01-0ubuntu2.1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "google-guest-agent",
            "binary_version":  "20250506.01-0ubuntu2.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

grpc

Package

Name: grpc
Purl: pkg:deb/ubuntu/grpc?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.51.1-6build1

1.51.1-7

1.51.1-7ubuntu2

1.51.1-7ubuntu3

1.51.1-8ubuntu1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libgrpc++1.51t64",
            "binary_version":  "1.51.1-8ubuntu1"
        },
        {
            "binary_name":  "libgrpc29t64",
            "binary_version":  "1.51.1-8ubuntu1"
        },
        {
            "binary_name":  "protobuf-compiler-grpc",
            "binary_version":  "1.51.1-8ubuntu1"
        },
        {
            "binary_name":  "python3-grpcio",
            "binary_version":  "1.51.1-8ubuntu1"
        },
        {
            "binary_name":  "ruby-grpc",
            "binary_version":  "1.51.1-8ubuntu1"
        },
        {
            "binary_name":  "ruby-grpc-tools",
            "binary_version":  "1.51.1-8ubuntu1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:Pro:16.04:LTS

google-guest-agent

Package

Name: google-guest-agent
Purl: pkg:deb/ubuntu/google-guest-agent?arch=source&distro=esm-apps-legacy%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

20201217.*

20201217.02-0ubuntu1~16.04.0

20230426.*

20230426.00-0ubuntu2~16.04.3

20231004.*

20231004.02-0ubuntu1~16.04.1

20231004.02-0ubuntu1~16.04.2

20240716.*

20240716.00-0ubuntu1~16.04.0

20240716.00-0ubuntu1~16.04.0+esm1

20240716.00-0ubuntu1~16.04.0+esm2

20240716.00-0ubuntu1~16.04.0+esm3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "google-guest-agent",
            "binary_version":  "20240716.00-0ubuntu1~16.04.0+esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:Pro:18.04:LTS

google-guest-agent

Package

Name: google-guest-agent
Purl: pkg:deb/ubuntu/google-guest-agent?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

20201217.*

20201217.02-0ubuntu1~18.04.0

20210414.*

20210414.00-0ubuntu1~18.04.0

20210629.*

20210629.00-0ubuntu1~18.04.1

20220622.*

20220622.00-0ubuntu2~18.04.0

20220622.00-0ubuntu2~18.04.1

20230426.*

20230426.00-0ubuntu2~18.04.0

20231004.*

20231004.02-0ubuntu1~18.04.2

20231004.02-0ubuntu1~18.04.3

20240716.*

20240716.00-0ubuntu1~18.04.0

20241011.*

20241011.01-0ubuntu1~18.04.0

20241011.01-0ubuntu1~18.04.0+esm1

20241011.01-0ubuntu1~18.04.0+esm2

20241011.01-0ubuntu1~18.04.0+esm3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "google-guest-agent",
            "binary_version":  "20241011.01-0ubuntu1~18.04.0+esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:Pro:20.04:LTS

google-guest-agent

Package

Name: google-guest-agent
Purl: pkg:deb/ubuntu/google-guest-agent?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

20201217.*

20201217.02-0ubuntu1~20.04.0

20210414.*

20210414.00-0ubuntu1~20.04.0

20210629.*

20210629.00-0ubuntu1~20.04.0

20220622.*

20220622.00-0ubuntu2~20.04.0

20220622.00-0ubuntu2~20.04.2

20230426.*

20230426.00-0ubuntu2~20.04.0

20231004.*

20231004.02-0ubuntu1~20.04.1

20231004.02-0ubuntu1~20.04.2

20231004.02-0ubuntu1~20.04.3

20231004.02-0ubuntu1~20.04.4

20240716.*

20240716.00-0ubuntu1~20.04.0

20241011.*

20241011.01-0ubuntu1~20.04.1

20250116.*

20250116.00-0ubuntu1~20.04.0

20250116.00-0ubuntu1~20.04.0+esm1

20250116.00-0ubuntu1~20.04.0+esm2

20250116.00-0ubuntu1~20.04.0+esm3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "google-guest-agent",
            "binary_version":  "20250116.00-0ubuntu1~20.04.0+esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"

Ubuntu:Pro:24.04:LTS

golang-google-grpc

Package

Name: golang-google-grpc
Purl: pkg:deb/ubuntu/golang-google-grpc?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.38.0+really1.33.3-1build1

1.38.0+really1.33.3-1ubuntu0.24.04.1

1.38.0+really1.33.3-1ubuntu0.24.04.2

1.38.0+really1.33.3-1ubuntu0.24.04.2+esm1

1.38.0+really1.33.3-1ubuntu0.24.04.3

1.38.0+really1.33.3-1ubuntu0.24.04.3+esm1

1.38.0+really1.33.3-1ubuntu0.24.04.3+esm2

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "golang-google-grpc-dev",
            "binary_version":  "1.38.0+really1.33.3-1ubuntu0.24.04.3+esm2"
        },
        {
            "binary_name":  "protoc-gen-go-grpc",
            "binary_version":  "1.38.0+really1.33.3-1ubuntu0.24.04.3+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84303.json"