Apache · Apache Traffic Server · CVE-2021-32566
**Name of the Vulnerable Software and Affected Versions**
Apache Traffic Server versions 7.0.0 through 7.1.12
Apache Traffic Server versions 8.0.0 through 8.1.1
Apache Traffic Server versions 9.0.0 through 9.0.1
**Description**
The issue is caused by improper input validation in the HTTP/2 component of Apache Traffic Server. This allows a remote attacker to cause a denial of service.
**Recommendations**
For Apache Traffic Server versions 7.0.0 through 7.1.12, update to a version outside of this range to resolve the issue.
For Apache Traffic Server versions 8.0.0 through 8.1.1, update to a version outside of this range to resolve the issue.
For Apache Traffic Server versions 9.0.0 through 9.0.1, update to a version outside of this range to resolve the issue.
As a temporary workaround, consider restricting access to the HTTP/2 component until a patch is available.