Back to Database
Status published
High
CVE-2021-37149
Request Smuggling - multiple attacks
Vulnerability Description
Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-37149
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Apache Traffic Server would like to thank Mattias Grenfeldt and Asta Olofsson for reporting this issue
References
More from Apache Software Foundation
View All →CVE-2025-69233
Apache CloudStack: Domain/account resources limits not honored
Medium
6.5
CVE-2025-69219
Apache Airflow Providers Http: Unsafe Pickle Deserialization in apache-airflow-providers-http leading to RCE via HttpOperator
Unknown
0
CVE-2025-68675
Apache Airflow: proxy credentials for various providers might leak in task logs
Unknown
0
CVE-2025-68637
Apache Uniffle: Insecure SSL Configuration in Uniffle HTTP Client
Unknown
0
CVE-2025-68493
Apache Struts, Apache Struts: XXE vulnerability in outdated XWork component
Unknown
0
Affected Vendor
Apache Software Foundation
View all reports →Affected Software
Apache Traffic Server
Vulnerable Versions:
8.0.0 to 8.1.2 and 9.0.0 to 9.1.0
Timeline
Official Publish:
November 3rd, 2021
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N