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
- cert-manager, gatekeeper-fips, grafana-alloy, loki, prometheus, stakater-reloader, tempo, vault, velero
- Affected versions
- Not specified
- Fixed versions
- 1.16.2-r16, 1.20.1-r1, 1.20.3-r6, 1.20.4-r14, 1.21.4-r15, 1.4.20-r2, 2.1.1-r1, 2.10.8-r4, 3.0.3-r3, 3.11.3-r10, 3.14.0-r1, 3.22.0-r0, 3.6.15-r2, 3.7.6-r1
- CVEs
- CVE-2026-78663
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 13:28 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 20 Oct 2026, 00:39 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-NF66444
velero
Fixed versions: 1.16.2-r16
gatekeeper-fips
Fixed versions: 3.22.0-r0
vault
Fixed versions: 2.1.1-r1
vault
Fixed versions: 2.1.1-r1
prometheus
Fixed versions: 3.14.0-r1
stakater-reloader
Fixed versions: 1.4.20-r2
vault
Fixed versions: 1.20.4-r14
vault
Fixed versions: 1.20.4-r14
prometheus
Fixed versions: 3.11.3-r10
vault
Fixed versions: 1.21.4-r15
vault
Fixed versions: 1.21.4-r15
loki
Fixed versions: 3.7.6-r1
loki
Fixed versions: 3.7.6-r1
loki
Fixed versions: 3.7.6-r1
loki
Fixed versions: 3.7.6-r1
grafana-alloy
Fixed versions: 1.20.1-r1
loki
Fixed versions: 3.6.15-r2
loki
Fixed versions: 3.6.15-r2
loki
Fixed versions: 3.6.15-r2
loki
Fixed versions: 3.6.15-r2
tempo
Fixed versions: 2.10.8-r4
tempo
Fixed versions: 3.0.3-r3
cert-manager
Fixed versions: 1.20.3-r6
Complete source record
{
"id": "f1e6343c708ac3729d22ff3cf6ee23be006db8d81dcea0f915454f270cc4d503",
"url": "https://osv.dev/vulnerability/CLEANSTART-2026-NF66444",
"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-NF66444",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
},
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{
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"evidence": "/affected/0/ranges"
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},
{
"name": {
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"evidence": "/affected/1/package/name"
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"fixed_versions": [
{
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],
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},
{
"name": {
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"evidence": "/affected/2/package/name"
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{
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{
"name": {
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"evidence": "/affected/4/package/name"
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{
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"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "stakater-reloader",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.20-r2",
"evidence": "/affected/5/ranges"
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{
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],
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},
{
"name": {
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"evidence": "/affected/7/package/name"
},
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{
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"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "prometheus",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.11.3-r10",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "vault",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "vault",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.21.4-r15",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.6-r1",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.6-r1",
"evidence": "/affected/12/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.6-r1",
"evidence": "/affected/13/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.6-r1",
"evidence": "/affected/14/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grafana-alloy",
"evidence": "/affected/15/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.20.1-r1",
"evidence": "/affected/15/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/16/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.15-r2",
"evidence": "/affected/16/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/17/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.15-r2",
"evidence": "/affected/17/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/18/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.15-r2",
"evidence": "/affected/18/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "loki",
"evidence": "/affected/19/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.15-r2",
"evidence": "/affected/19/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tempo",
"evidence": "/affected/20/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.8-r4",
"evidence": "/affected/20/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tempo",
"evidence": "/affected/21/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.3-r3",
"evidence": "/affected/21/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "cert-manager",
"evidence": "/affected/22/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.20.3-r6",
"evidence": "/affected/22/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CLEANSTART-2026-NF66444",
"aliases": [
"CLEANSTART-2026-NF66444"
],
"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": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.16.2-r16"
}
]
}
],
"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-NF66444.json"
}
},
{
"ranges": [
{
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"events": [
{
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},
{
"fixed": "3.22.0-r0"
}
]
}
],
"package": {
"name": "gatekeeper-fips",
"purl": "pkg:apk/cleanstart/gatekeeper-fips",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "2.1.1-r1"
}
]
}
],
"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-NF66444.json"
}
},
{
"ranges": [
{
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"events": [
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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-NF66444.json"
}
},
{
"ranges": [
{
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"events": [
{
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{
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],
"package": {
"name": "prometheus",
"purl": "pkg:apk/cleanstart/prometheus",
"ecosystem": "CleanStart"
},
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}
},
{
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{
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}
],
"package": {
"name": "stakater-reloader",
"purl": "pkg:apk/cleanstart/stakater-reloader",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
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],
"package": {
"name": "vault",
"purl": "pkg:apk/cleanstart/vault?arch=aarch64",
"ecosystem": "CleanStart"
},
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},
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}
},
{
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{
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],
"package": {
"name": "prometheus",
"purl": "pkg:apk/cleanstart/prometheus",
"ecosystem": "CleanStart"
},
"database_specific": {
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}
},
{
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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-NF66444.json"
}
},
{
"ranges": [
{
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"events": [
{
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},
{
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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-NF66444.json"
}
},
{
"ranges": [
{
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"events": [
{
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},
{
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}
]
}
],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=x86_64",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
"ranges": [
{
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"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.6-r1"
}
]
}
],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=aarch64",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
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{
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"events": [
{
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},
{
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}
]
}
],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=ppc64le",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "3.7.6-r1"
}
]
}
],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=loongarch64",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
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{
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"events": [
{
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{
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}
],
"package": {
"name": "grafana-alloy",
"purl": "pkg:apk/cleanstart/grafana-alloy",
"ecosystem": "CleanStart"
},
"database_specific": {
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}
},
{
"ranges": [
{
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"events": [
{
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},
{
"fixed": "3.6.15-r2"
}
]
}
],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=x86_64",
"ecosystem": "CleanStart"
},
"database_specific": {
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{
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],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=aarch64",
"ecosystem": "CleanStart"
},
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}
},
{
"ranges": [
{
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"events": [
{
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{
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]
}
],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=ppc64le",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.15-r2"
}
]
}
],
"package": {
"name": "loki",
"purl": "pkg:apk/cleanstart/loki?arch=loongarch64",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.8-r4"
}
]
}
],
"package": {
"name": "tempo",
"purl": "pkg:apk/cleanstart/tempo",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.3-r3"
}
]
}
],
"package": {
"name": "tempo",
"purl": "pkg:apk/cleanstart/tempo",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.20.3-r6"
}
]
}
],
"package": {
"name": "cert-manager",
"purl": "pkg:apk/cleanstart/cert-manager",
"ecosystem": "CleanStart"
},
"database_specific": {
"source": "https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-NF66444.json"
}
}
],
"modified": "2026-10-21T01:15:10.091352355Z",
"provider": "osv",
"upstream": [
"CVE-2026-78663"
],
"references": [
"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-NF66444.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": 390800,
"published_at": "2026-10-20T00:39:24.015546+00:00"
}