Medium
grpc — security advisory
gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in https://github.com/grpc/grpc/pull/32309 https://www.google.com/url
- Products
- grpc
- Affected versions
- 1.51.1-10, 1.51.1-3, 1.51.1-4, 1.51.1-4.1, 1.51.1-4.1~exp1, 1.51.1-5, 1.51.1-6, 1.51.1-7, 1.51.1-8, 1.51.1-9, 1.59.5-1, 1.82.0-1, 1.83.0-1, 1.83.0-2
- Fixed versions
- Not specified
- CVEs
- CVE-2023-32732
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:49 UTC · Revision 1
Source evidence
gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in https://github.com/grpc/grpc/pull/32309 https://www.google.com/url
osv:DEBIAN-CVE-2023-32732
grpc
Fixed versions: Not specified
grpc
Fixed versions: Not specified
grpc
Fixed versions: Not specified
Complete source record
{
"id": "4dffdf6e6adeb48765e380892937b56d47810aecdbf3e6db25e275c44a1d35dd",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-32732",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-32732",
"summary": "gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in https://github.com/grpc/grpc/pull/32309 https://www.google.com/url",
"evidence": "osv:DEBIAN-CVE-2023-32732",
"products": [
{
"name": {
"value": "grpc",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.51.1-10",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-4.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-4.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-5",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-6",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-7",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-8",
"evidence": "/affected/0/versions"
},
{
"value": "1.51.1-9",
"evidence": "/affected/0/versions"
},
{
"value": "1.59.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.82.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.83.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.83.0-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "grpc",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.51.1-10",
"evidence": "/affected/1/versions"
},
{
"value": "1.51.1-6",
"evidence": "/affected/1/versions"
},
{
"value": "1.51.1-7",
"evidence": "/affected/1/versions"
},
{
"value": "1.51.1-8",
"evidence": "/affected/1/versions"
},
{
"value": "1.51.1-9",
"evidence": "/affected/1/versions"
},
{
"value": "1.59.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.82.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.83.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.83.0-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "grpc",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.51.1-10",
"evidence": "/affected/2/versions"
},
{
"value": "1.51.1-6",
"evidence": "/affected/2/versions"
},
{
"value": "1.51.1-7",
"evidence": "/affected/2/versions"
},
{
"value": "1.51.1-8",
"evidence": "/affected/2/versions"
},
{
"value": "1.51.1-9",
"evidence": "/affected/2/versions"
},
{
"value": "1.59.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.82.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.83.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.83.0-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2023-32732",
"aliases": [
"DEBIAN-CVE-2023-32732"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "grpc",
"purl": "pkg:deb/debian/grpc?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
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"1.51.1-3",
"1.51.1-4",
"1.51.1-4.1",
"1.51.1-4.1~exp1",
"1.51.1-5",
"1.51.1-6",
"1.51.1-7",
"1.51.1-8",
"1.51.1-9",
"1.59.5-1",
"1.82.0-1",
"1.83.0-1",
"1.83.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-32732.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "grpc",
"purl": "pkg:deb/debian/grpc?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.51.1-10",
"1.51.1-6",
"1.51.1-7",
"1.51.1-8",
"1.51.1-9",
"1.59.5-1",
"1.82.0-1",
"1.83.0-1",
"1.83.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-32732.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "grpc",
"purl": "pkg:deb/debian/grpc?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.51.1-10",
"1.51.1-6",
"1.51.1-7",
"1.51.1-8",
"1.51.1-9",
"1.59.5-1",
"1.82.0-1",
"1.83.0-1",
"1.83.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-32732.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T18:01:58.980618435Z",
"provider": "osv",
"upstream": [
"CVE-2023-32732"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-32732"
]
},
"related_cves": [
{
"value": "CVE-2023-32732",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 455787,
"published_at": "2023-06-09T11:15:09.377+00:00"
}