Medium
Security advisory
A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-10687
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:30 UTC · Revision 1
Source evidence
A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.
osv:CVE-2020-10687
Complete source record
{
"id": "629eea65b31f2aeb6d0d3079f8c9a7ccf04fb239a3c8b6e0c19d9d00c65cdbb6",
"url": "https://osv.dev/vulnerability/CVE-2020-10687",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-10687",
"summary": "A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.",
"evidence": "osv:CVE-2020-10687",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-10687",
"aliases": [
"CVE-2020-10687",
"GHSA-p9w3-gwc2-cr49"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/undertow-io/undertow",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "8ddcc2608f58ed3377474f4e537728c5518a7862"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.2.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"2.1.4.Final",
"2.1.3.Final",
"2.1.2.Final",
"2.1.1.Final",
"2.1.0.Final",
"2.0.29.Final",
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"1.0.0.Beta17",
"1.0.0.Beta16",
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"1.0.0.Alpha7",
"1.0.0.Alpha6",
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"1.0.0.Alpha4",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-10687.json"
}
}
],
"modified": "2026-10-24T10:30:40.460922871Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/r6603513ea8afbf6857fd77ca5888ec8385d0af493baa4250e28c351c%40%3Cdev.cxf.apache.org%3E",
"https://security.netapp.com/advisory/ntap-20220210-0015/",
"https://bugzilla.redhat.com/show_bug.cgi?id=1785049"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.2:*:*:*:*:*:*:*",
"cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.3:*:*:*:*:*:*:*",
"cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:jboss_enterprise_application_platform",
"extracted_events": [
{
"range": [
{
"introduced": "7.2"
},
{
"last_affected": "7.2"
},
{
"introduced": "7.3"
},
{
"last_affected": "7.3"
},
{
"introduced": "7.4"
},
{
"last_affected": "7.4"
},
{
"introduced": "7.3"
},
{
"last_affected": "7.3"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-10687",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 434923,
"published_at": "2020-09-23T13:15:15.157+00:00"
}