DEBIAN-CVE-2026-50052
In Vinyl Cache before 9.0.1 and Varnish Cache before 9.0.3, a deficiency in HTTP/2 request parsing can be exploited to launch a backend request desync attack (request smuggling), which in turn can be used for cache poisoning, authentication bypass, or possibly even information disclosure and manipulation. The attack vector only exists if HTTP/2 support is enabled by setting the feature parameter to contain +http2. HTTP/2 support is disabled by default.
DEBIAN-CVE-2026-50052
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-50052
varnish
Source reference: /affected/0/package/name
- Affected versions
- 7.7.0-3
Source reference:
/affected/0/versions - Fixed versions
- 7.7.0-3+deb13u1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.7.0-3+deb13u1"
}
]
}
],
"package": {
"name": "varnish",
"purl": "pkg:deb/debian/varnish?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"7.7.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50052.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57281 · Revision 1
- Added to Heist Feed
- Publisher date