CVE-2026-33267

Apache Traffic Server: Untrusted @ headers can spoof ATS internal metadata

Published Jul 29, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache traffic Server
Vendors & Products Apache
Apache traffic Server
Type Values Removed Values Added
Description 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.
Title Apache Traffic Server: Untrusted @ headers can spoof ATS internal metadata
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Jul 30, 2026, 3:55 AM
Reserved
Mar 18, 2026, 3:36 PM
Status
Analyzed
Published
Jul 29, 2026, 8:16 AM
Modified
Oct 23, 2026, 11:10 PM