CVE-2021-36740 - CVE House
Back to Database
Status published Medium CVE-2021-36740

Varnish Cache, with HTTP/2 enabled, allows request smuggling and VCL...

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-36740

Credits & Attribution

No credits recorded in the NVD database.

References

More from varnish-cache

View All →
CVE-2021-28543
Varnish varnish-modules before 0.17.1 allows remote attackers to cause a...
Medium 4
CVE-2020-11653
An issue was discovered in Varnish Cache before 6.0.6 LTS,...
High 7.5
CVE-2019-20637
An issue was discovered in Varnish Cache before 6.0.5 LTS,...
High 7.5
CVE-2017-12425
An issue was discovered in Varnish HTTP Cache 4.0.1 through...
High 7.5
CVE-2013-4484
Varnish before 3.0.5 allows remote attackers to cause a denial...
Medium 5

Affected Vendor

varnish-cache

View all reports →

Affected Software

varnish cache, fedora, debian linux
Vulnerable Versions:
6.0.0, 6.0.8, 5.0.0, 6.1.0, 33, 34, 10.0, 11.0

Timeline

Official Publish: July 14th, 2021
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.