CVE-2023-38522

Apache Traffic Server: Incomplete field name check allows request smuggling

Published Jul 26, 2024 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.

Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3897-1 trafficserver security update
Debian DSA Debian DSA DSA-5758-1 trafficserver security update
EUVD EUVD EUVD-2023-42321 Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.
History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:traffic_server:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:9.0.0:*:*:*:*:*:*:*
Metrics ssvc

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

Type Values Removed Values Added
Weaknesses CWE-20
Type Values Removed Values Added
Weaknesses CWE-20
Type Values Removed Values Added
First Time appeared Apache
Apache traffic Server
Weaknesses CWE-444
CPEs cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*
Vendors & Products Apache
Apache traffic Server
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Nov 3, 2025, 9:49 PM
Reserved
Jul 18, 2023, 7:58 PM
Status
Modified
Published
Jul 26, 2024, 10:15 AM
Modified
Jun 17, 2026, 6:10 AM
Severity
Moderate
Public date
Jul 25, 2024, 12:00 AM