What’s Vulnerable › Vulnerabilities
CVE-2026-41920: Apache Traffic Server: SNI to Host header matching policy is not properly enforced
- Severity: critical (CVSS 9.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-29 · updated 2026-10-23
- Weakness: CWE-284
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.
Affected products
- Apache Software Foundation Apache Traffic Server: from 9.0.0 before 9.2.15; from 10.0.0 before 10.1.4 — fixed in 10.1.4, 9.2.15
How to fix
Upgrade to a fixed version: Apache Software Foundation Apache Traffic Server 10.1.4, 9.2.15. Check the vendor advisory for mitigations.
References
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