Medium
trafficserver — security advisory
Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves the encoder out of sync with the peer decoder and corrupts subsequent header blocks on the connection. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
- Products
- trafficserver
- Affected versions
- 5.3.0-2ubuntu1, 5.3.0-2ubuntu2, 7.0.0-5, 7.1.2+ds-2, 7.1.2+ds-2build1, 7.1.2+ds-3, 8.0.5+ds-1, 8.0.5+ds-2, 8.0.5+ds-2build1, 8.0.5+ds-2ubuntu1, 8.0.5+ds-3, 8.0.5+ds-3ubuntu0.1~esm1, 8.1.1+ds-1.1, 9.1.1+ds-2build1, 9.1.1+ds-2ubuntu0.1, 9.1.1+ds-2ubuntu0.1+esm1, 9.1.1+ds-2ubuntu0.1~esm1, 9.2.1+ds-1build1, 9.2.2+ds-1, 9.2.3+ds-1, 9.2.3+ds-1+deb12u1, 9.2.3+ds-1+deb12u1build1, 9.2.3+ds-1+deb12u1build3, 9.2.3+ds-1+deb12u1build4, 9.2.3+ds-1+deb12u1ubuntu0.1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-65100
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 09:09 UTC · Revision 1
Source evidence
Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves the encoder out of sync with the peer decoder and corrupts subsequent header blocks on the connection. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
osv:UBUNTU-CVE-2026-65100
trafficserver
Fixed versions: Not specified
trafficserver
Fixed versions: Not specified
trafficserver
Fixed versions: Not specified
trafficserver
Fixed versions: Not specified
trafficserver
Fixed versions: Not specified
Complete source record
{
"id": "ba8e72e68a445d45dffb6b2d9f4e8293bd22dd1796bea9ad6d63fedac334c691",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-65100",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-65100",
"summary": "Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves the encoder out of sync with the peer decoder and corrupts subsequent header blocks on the connection. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.",
"evidence": "osv:UBUNTU-CVE-2026-65100",
"products": [
{
"name": {
"value": "trafficserver",
"evidence": "/affected/0/package/name"
},
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"fixed_versions": [],
"affected_versions": [
{
"value": "5.3.0-2ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "5.3.0-2ubuntu2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
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"affected_versions": [
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"value": "7.0.0-5",
"evidence": "/affected/1/versions"
},
{
"value": "7.1.2+ds-2",
"evidence": "/affected/1/versions"
},
{
"value": "7.1.2+ds-2build1",
"evidence": "/affected/1/versions"
},
{
"value": "7.1.2+ds-3",
"evidence": "/affected/1/versions"
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},
{
"name": {
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"evidence": "/affected/2/package/name"
},
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"affected_versions": [
{
"value": "8.0.5+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.0.5+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "8.0.5+ds-2build1",
"evidence": "/affected/2/versions"
},
{
"value": "8.0.5+ds-2ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "8.0.5+ds-3",
"evidence": "/affected/2/versions"
},
{
"value": "8.0.5+ds-3ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
}
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},
{
"name": {
"value": "trafficserver",
"evidence": "/affected/3/package/name"
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"affected_versions": [
{
"value": "8.1.1+ds-1.1",
"evidence": "/affected/3/versions"
},
{
"value": "9.1.1+ds-2build1",
"evidence": "/affected/3/versions"
},
{
"value": "9.1.1+ds-2ubuntu0.1~esm1",
"evidence": "/affected/3/versions"
},
{
"value": "9.1.1+ds-2ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "9.1.1+ds-2ubuntu0.1+esm1",
"evidence": "/affected/3/versions"
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]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "9.2.1+ds-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "9.2.2+ds-1",
"evidence": "/affected/4/versions"
},
{
"value": "9.2.3+ds-1",
"evidence": "/affected/4/versions"
},
{
"value": "9.2.3+ds-1+deb12u1",
"evidence": "/affected/4/versions"
},
{
"value": "9.2.3+ds-1+deb12u1build1",
"evidence": "/affected/4/versions"
},
{
"value": "9.2.3+ds-1+deb12u1build3",
"evidence": "/affected/4/versions"
},
{
"value": "9.2.3+ds-1+deb12u1build4",
"evidence": "/affected/4/versions"
},
{
"value": "9.2.3+ds-1+deb12u1ubuntu0.1",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-65100",
"aliases": [
"UBUNTU-CVE-2026-65100"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "trafficserver",
"purl": "pkg:deb/ubuntu/trafficserver?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"5.3.0-2ubuntu1",
"5.3.0-2ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65100.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "trafficserver",
"binary_version": "5.3.0-2ubuntu2"
},
{
"binary_name": "trafficserver-experimental-plugins",
"binary_version": "5.3.0-2ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "trafficserver",
"purl": "pkg:deb/ubuntu/trafficserver?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"7.0.0-5",
"7.1.2+ds-2",
"7.1.2+ds-2build1",
"7.1.2+ds-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65100.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "trafficserver",
"binary_version": "7.1.2+ds-3"
},
{
"binary_name": "trafficserver-experimental-plugins",
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},
{
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"package": {
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"purl": "pkg:deb/ubuntu/trafficserver?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"8.0.5+ds-1",
"8.0.5+ds-2",
"8.0.5+ds-2build1",
"8.0.5+ds-2ubuntu1",
"8.0.5+ds-3",
"8.0.5+ds-3ubuntu0.1~esm1"
],
"database_specific": {
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},
"ecosystem_specific": {
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"binary_name": "trafficserver",
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},
"versions": [
"8.1.1+ds-1.1",
"9.1.1+ds-2build1",
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"9.1.1+ds-2ubuntu0.1+esm1"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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}
]
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},
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/trafficserver?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
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"9.2.2+ds-1",
"9.2.3+ds-1",
"9.2.3+ds-1+deb12u1",
"9.2.3+ds-1+deb12u1build1",
"9.2.3+ds-1+deb12u1build3",
"9.2.3+ds-1+deb12u1build4",
"9.2.3+ds-1+deb12u1ubuntu0.1"
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"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "trafficserver",
"binary_version": "9.2.3+ds-1+deb12u1ubuntu0.1"
},
{
"binary_name": "trafficserver-experimental-plugins",
"binary_version": "9.2.3+ds-1+deb12u1ubuntu0.1"
}
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}
],
"modified": "2026-10-08T12:54:22.477773636Z",
"provider": "osv",
"upstream": [
"CVE-2026-65100"
],
"references": [
"https://ubuntu.com/security/CVE-2026-65100",
"https://www.cve.org/CVERecord?id=CVE-2026-65100",
"https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d"
]
},
"related_cves": [
{
"value": "CVE-2026-65100",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 99598,
"published_at": "2026-07-29T10:16:00+00:00"
}