CVE-2026-33267
Apache Traffic Server: Untrusted @ headers can spoof ATS internal metadata
CVSS Score
10.0
EPSS Score
0.0%
EPSS Percentile
0th
Improper Input Validation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.14, from 10.1.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fixes the issue.
| CWE | CWE-20 |
| Vendor | apache software foundation |
| Product | apache traffic server |
| Published | Jul 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Apache Software Foundation / Apache Traffic Server
9.2.0 ≤ 9.2.14 10.1.0 ≤ 10.1.3
References
Credits
🔍 Charlie Campbell 🔍 Apache Community