Medium
Security advisory
Pages that are rendered using the ESI plugin can have access to the cookie header when the plugin is configured not to allow access. This affects Apache Traffic Server (ATS) versions 6.0.0 to 6.2.2 and 7.0.0 to 7.1.3. To resolve this issue users running 6.x should upgrade to 6.2.3 or later versions and 7.x users should upgrade to 7.1.4 or later versions.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-8040
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:52 UTC · Revision 1
Source evidence
Pages that are rendered using the ESI plugin can have access to the cookie header when the plugin is configured not to allow access. This affects Apache Traffic Server (ATS) versions 6.0.0 to 6.2.2 and 7.0.0 to 7.1.3. To resolve this issue users running 6.x should upgrade to 6.2.3 or later versions and 7.x users should upgrade to 7.1.4 or later versions.
osv:CVE-2018-8040
Complete source record
{
"id": "ebe5a8c7645d8080959e71e365963acedbed1aa34b38c9e0d641c926c58d3559",
"url": "https://osv.dev/vulnerability/CVE-2018-8040",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-8040",
"summary": "Pages that are rendered using the ESI plugin can have access to the cookie header when the plugin is configured not to allow access. This affects Apache Traffic Server (ATS) versions 6.0.0 to 6.2.2 and 7.0.0 to 7.1.3. To resolve this issue users running 6.x should upgrade to 6.2.3 or later versions and 7.x users should upgrade to 7.1.4 or later versions.",
"evidence": "osv:CVE-2018-8040",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2018-8040",
"aliases": [
"CVE-2018-8040"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/trafficserver",
"type": "GIT",
"events": [
{
"introduced": "27f8e2cda9133864e6ffae0224c799fde5f10290"
},
{
"last_affected": "0b7b630858b4983d077a63074776abdfa48778f8"
},
{
"introduced": "6c1c6cf20e7d0e287d697a0f4181436013d17c30"
},
{
"last_affected": "e1b54b7d459c9df42ec511b93d7b3e51bd90f3f9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "6.0.0"
},
{
"last_affected": "6.2.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0"
},
{
"last_affected": "7.1.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-8040.json"
}
}
],
"modified": "2026-10-24T10:50:33.557002492Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/36b3df68fe7311965f6bc4630ca413d2aa99d8f1d53affda85ea70d7%40%3Cusers.trafficserver.apache.org%3E",
"https://lists.apache.org/thread.html/cc7aa2ce1c6f4fe0c6bfef517763cdaad30ec7bcb0115b73f73f3c01%40%3Cusers.trafficserver.apache.org%3E",
"https://www.debian.org/security/2018/dsa-4282",
"https://github.com/apache/trafficserver/pull/3926"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-8040",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 442290,
"published_at": "2018-08-29T13:29:02.2+00:00"
}