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.
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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 04 Nov 2025 07:30:00 +0900

Type Values Removed Values Added
References

Sat, 20 Sep 2025 03:15:00 +0900

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'}


Thu, 29 May 2025 02:00:00 +0900

Type Values Removed Values Added
References

Thu, 22 May 2025 11:30:00 +0900


Tue, 10 Sep 2024 04:00:00 +0900

Type Values Removed Values Added
Weaknesses CWE-20

Wed, 04 Sep 2024 02:00:00 +0900

Type Values Removed Values Added
Weaknesses CWE-20
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 13 Aug 2024 18:45:00 +0900

Type Values Removed Values Added
Weaknesses CWE-20

Mon, 12 Aug 2024 23:00:00 +0900

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2025-11-03T21:49:13.216Z

Reserved: 2023-07-18T19:58:23.902Z

Link: CVE-2023-38522

cve-icon Vulnrichment

Updated: 2025-11-03T21:49:13.216Z

cve-icon NVD

Status : Modified

Published: 2024-07-26T10:15:01.923

Modified: 2025-11-03T22:16:24.683

Link: CVE-2023-38522

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-07-25T00:00:00Z

Links: CVE-2023-38522 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses