CriticalFix available
HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a r...
Type: advisorySources: OSV
CVE-2026-78663 affects multiple packages. The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. See references for individual vulnerability details.
- Products
- rabbitmq-messaging-topology-operator, restic, vault, velero
- Affected versions
- Not specified
- Fixed versions
- 0.18.1-r11, 1.15.2-r12, 1.17.2-r12, 1.17.4-r3, 1.18.3-r6, 1.19.3-r9, 1.19.5-r8
- CVEs
- CVE-2026-78663
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 19:29 UTC · Revision 1
Source evidence
HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a r...
core-osv · Original sourcePublished 16 Oct 2026, 00:36 UTC
CVE-2026-78663 affects multiple packages. The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. See references for individual vulnerability details.
osv:CLEANSTART-2026-VR65122
rabbitmq-messaging-topology-operator
Fixed versions: 1.17.4-r3
rabbitmq-messaging-topology-operator
Fixed versions: 1.18.3-r6
rabbitmq-messaging-topology-operator
Fixed versions: 1.19.3-r9
restic
Fixed versions: 0.18.1-r11
velero
Fixed versions: 1.15.2-r12
velero
Fixed versions: 1.17.2-r12
vault
Fixed versions: 1.19.5-r8
vault
Fixed versions: 1.19.5-r8
Complete source record
{
"id": "a655e1a6c51b0a36f72784548340ea290cce0991a68940e1928c46db26f57b4b",
"url": "https://osv.dev/vulnerability/CLEANSTART-2026-VR65122",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a r...",
"summary": "CVE-2026-78663 affects multiple packages. The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. See references for individual vulnerability details.",
"evidence": "osv:CLEANSTART-2026-VR65122",
"products": [
{
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"evidence": "/affected/0/package/name"
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{
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"affected_versions": []
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{
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"evidence": "/affected/3/ranges"
}
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/4/package/name"
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"prerequisites": [],
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"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/5/package/name"
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"affected_versions": []
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{
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},
"prerequisites": [],
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"evidence": "/affected/6/ranges"
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"affected_versions": []
},
{
"name": {
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},
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"evidence": "/affected/7/ranges"
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],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CLEANSTART-2026-VR65122",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"
}
],
"affected": [
{
"ranges": [
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"events": [
{
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},
{
"fixed": "1.17.4-r3"
}
]
}
],
"package": {
"name": "rabbitmq-messaging-topology-operator",
"purl": "pkg:apk/cleanstart/rabbitmq-messaging-topology-operator",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-VR65122.json"
}
},
{
"ranges": [
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"events": [
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},
{
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}
],
"package": {
"name": "rabbitmq-messaging-topology-operator",
"purl": "pkg:apk/cleanstart/rabbitmq-messaging-topology-operator",
"ecosystem": "CleanStart"
},
"database_specific": {
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}
},
{
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],
"package": {
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"purl": "pkg:apk/cleanstart/rabbitmq-messaging-topology-operator",
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},
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}
},
{
"ranges": [
{
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"events": [
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{
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],
"package": {
"name": "restic",
"purl": "pkg:apk/cleanstart/restic",
"ecosystem": "CleanStart"
},
"database_specific": {
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}
},
{
"ranges": [
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"events": [
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},
{
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]
}
],
"package": {
"name": "velero",
"purl": "pkg:apk/cleanstart/velero",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-VR65122.json"
}
},
{
"ranges": [
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"events": [
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},
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],
"package": {
"name": "velero",
"purl": "pkg:apk/cleanstart/velero",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-VR65122.json"
}
},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
{
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{
"fixed": "1.19.5-r8"
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],
"package": {
"name": "vault",
"purl": "pkg:apk/cleanstart/vault?arch=aarch64",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-VR65122.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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],
"package": {
"name": "vault",
"purl": "pkg:apk/cleanstart/vault?arch=x86_64",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-VR65122.json"
}
}
],
"modified": "2026-10-16T00:45:03.558509941Z",
"provider": "osv",
"upstream": [
"CVE-2026-78663"
],
"references": [
"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-VR65122.json",
"https://osv.dev/vulnerability/CVE-2026-78663",
"https://nvd.nist.gov/vuln/detail/CVE-2026-78663"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2026-78663",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 336931,
"published_at": "2026-10-16T00:36:12.581214+00:00"
}