DEBIAN-CVE-2026-84303
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.
DEBIAN-CVE-2026-84303
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-84303
golang-google-grpc
Source reference: /affected/0/package/name
- Affected versions
- 1.33.3-2
Source reference:
/affected/0/versions1.38.0+really1.33.3-1Source reference:
/affected/0/versions1.38.0-1Source reference:
/affected/0/versions1.38.0-2Source reference:
/affected/0/versions1.38.0-3Source reference:
/affected/0/versions1.38.0-4Source reference:
/affected/0/versions1.38.0-5Source reference:
/affected/0/versions1.38.1-1Source reference:
/affected/0/versions1.59.0-1Source reference:
/affected/0/versions1.60.1-1Source reference:
/affected/0/versions1.60.1-2Source reference:
/affected/0/versions1.64.0-1Source reference:
/affected/0/versions1.64.0-2Source reference:
/affected/0/versions1.64.0-3Source reference:
/affected/0/versions1.64.0-4Source reference:
/affected/0/versions1.64.0-5Source reference:
/affected/0/versions1.64.0-6Source reference:
/affected/0/versions1.64.0-7Source reference:
/affected/0/versions1.66.3-1Source reference:
/affected/0/versions1.66.3-2Source reference:
/affected/0/versions1.75.1-1Source reference:
/affected/0/versions1.79.3-1Source reference:
/affected/0/versions1.79.3-1~bpo13+1Source reference:
/affected/0/versions1.81.1-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
golang-google-grpc
Source reference: /affected/1/package/name
- Affected versions
- 1.64.0-7
Source reference:
/affected/1/versions1.66.3-1Source reference:
/affected/1/versions1.66.3-2Source reference:
/affected/1/versions1.75.1-1Source reference:
/affected/1/versions1.79.3-1Source reference:
/affected/1/versions1.79.3-1~bpo13+1Source reference:
/affected/1/versions1.81.1-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
golang-google-grpc
Source reference: /affected/2/package/name
- Affected versions
- 1.64.0-7
Source reference:
/affected/2/versions1.66.3-1Source reference:
/affected/2/versions1.66.3-2Source reference:
/affected/2/versions1.75.1-1Source reference:
/affected/2/versions1.79.3-1Source reference:
/affected/2/versions1.79.3-1~bpo13+1Source reference:
/affected/2/versions1.81.1-1Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-google-grpc",
"purl": "pkg:deb/debian/golang-google-grpc?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.33.3-2",
"1.38.0+really1.33.3-1",
"1.38.0-1",
"1.38.0-2",
"1.38.0-3",
"1.38.0-4",
"1.38.0-5",
"1.38.1-1",
"1.59.0-1",
"1.60.1-1",
"1.60.1-2",
"1.64.0-1",
"1.64.0-2",
"1.64.0-3",
"1.64.0-4",
"1.64.0-5",
"1.64.0-6",
"1.64.0-7",
"1.66.3-1",
"1.66.3-2",
"1.75.1-1",
"1.79.3-1",
"1.79.3-1~bpo13+1",
"1.81.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84303.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-google-grpc",
"purl": "pkg:deb/debian/golang-google-grpc?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.64.0-7",
"1.66.3-1",
"1.66.3-2",
"1.75.1-1",
"1.79.3-1",
"1.79.3-1~bpo13+1",
"1.81.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84303.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-google-grpc",
"purl": "pkg:deb/debian/golang-google-grpc?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.64.0-7",
"1.66.3-1",
"1.66.3-2",
"1.75.1-1",
"1.79.3-1",
"1.79.3-1~bpo13+1",
"1.81.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84303.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58396 · Revision 1
- Added to Heist Feed
- Publisher date