CVE-2026-33267
CRITICALApache Traffic Server: Untrusted @ headers can spoof ATS internal metadata
Title source: cnaDescription
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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d
Scores
CVSS v3
10.0
EPSS
0.0024
EPSS Percentile
15.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-20
Status
published
Products (2)
Apache Software Foundation/Apache Traffic Server
10.1.0 - 10.1.3
Apache Software Foundation/Apache Traffic Server
9.2.0 - 9.2.14
Published
Jul 29, 2026
Tracked Since
Jul 29, 2026