HighFix available
rails — security advisory
A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.
- Products
- rails
- Affected versions
- Not specified
- Fixed versions
- 2:5.2.4.3+dfsg-1
- CVEs
- CVE-2020-8162
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 13:34 UTC · Revision 1
Source evidence
A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.
osv:DEBIAN-CVE-2020-8162
rails
Fixed versions: 2:5.2.4.3+dfsg-1
rails
Fixed versions: 2:5.2.4.3+dfsg-1
rails
Fixed versions: 2:5.2.4.3+dfsg-1
Complete source record
{
"id": "93f7ddb5feaa08d6ad1344f80a0eff42d39e73dc7d5b37850a223c89ba8c2f8b",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-8162",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-8162",
"summary": "A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.",
"evidence": "osv:DEBIAN-CVE-2020-8162",
"products": [
{
"name": {
"value": "rails",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:5.2.4.3+dfsg-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rails",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:5.2.4.3+dfsg-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rails",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:5.2.4.3+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2020-8162",
"aliases": [
"DEBIAN-CVE-2020-8162"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:5.2.4.3+dfsg-1"
}
]
}
],
"package": {
"name": "rails",
"purl": "pkg:deb/debian/rails?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-8162.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:5.2.4.3+dfsg-1"
}
]
}
],
"package": {
"name": "rails",
"purl": "pkg:deb/debian/rails?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-8162.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:5.2.4.3+dfsg-1"
}
]
}
],
"package": {
"name": "rails",
"purl": "pkg:deb/debian/rails?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-8162.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:02:33.309177569Z",
"provider": "osv",
"upstream": [
"CVE-2020-8162"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-8162"
]
},
"related_cves": [
{
"value": "CVE-2020-8162",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 452540,
"published_at": "2020-06-19T17:15:18.583+00:00"
}