VDB
DEBIAN-CVE-2021-36740
DEBIAN-CVE-2021-36740
PUBLISHED
CVSS 6.5 MEDIUM
Record from OSV · Published July 14, 2021
Varnish Cache, with HTTP/2 enabled, allows request smuggling and VCL authorization bypass via a large Content-Length header for a POST request. This affects Varnish Enterprise 6.0.x before 6.0.8r3, and Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| varnish | Debian:12 | 6.5.2-1 |
| varnish | Debian:13 | 6.5.2-1 |
Risk scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | varnish | 0 |
| Debian:13 | varnish | 0 |
Timeline
- Jul 14, 2021 CVE Published
- Oct 23, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln DEBIAN-CVE-2021-36740
vulnetix vdb fixes DEBIAN-CVE-2021-36740Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/DEBIAN-CVE-2021-36740/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart