CVE-2026-41920 Apache Traffic Server: SNI to Host header matching policy is not properly enforced
Attackers can bypass SNI to Host header matching policies in Apache Traffic Server, potentially circumventing access controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41920?
CVE-2026-41920 is a high-severity missing authorization vulnerability in Apache Traffic Server, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Access Control vulnerability in Apache Traffic Server.
This issue affects Apache Traffic Server: from 9.0.0 through 9.1.14, from 10.0.0 through 10.1.3.
Users are recommended to upgrade to version 9.1.15 or 10.1.4, which fixes the issue.
Weakness: CWE-284
Which versions are affected by CVE-2026-41920?
It affects 1 product.
Products include Apache Traffic Server.
How do I fix CVE-2026-41920?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-41920 being exploited?
There is no known exploitation of CVE-2026-41920 in the wild and no public exploit code.
Other vulnerabilities in Apache Traffic Server
Sources
Also known as DEBIAN-CVE-2026-41920, GHSA-cjg7-6cv5-8fpp, UBUNTU-CVE-2026-41920.