Apache Traffic Server
121 CVEs affecting Apache Traffic Server. Latest disclosed: 2026-07-29. Critical: 17, High: 79.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2026-58162 | Critical | 10.0 | 2026-07-29 | The Apache Traffic Server certifier plugin generates certificates based on attacker-controlled client SNI. This issue affects Apache Traffic Server: from 8.0… |
CVE-2026-58150 | Critical | 10.0 | 2026-07-29 | Apache Traffic Server does not reject Transfer-Encoding in HTTP/2 requests, allowing downgrade request smuggling. This issue affects Apache Traffic Server: fr… |
CVE-2026-57834 | Critical | 10.0 | 2026-07-29 | Apache Traffic Server allows request smuggling if chunked messages are malformed. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0… |
CVE-2026-33267 | Critical | 10.0 | 2026-07-29 | 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… |
CVE-2021-43082 | Critical | 9.8 | 2021-11-03 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server allows an attacker… |
CVE-2021-35474 | Critical | 9.8 | 2021-06-30 | Stack-based Buffer Overflow vulnerability in cachekey plugin of Apache Traffic Server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1… |
CVE-2020-1944 | Critical | 9.8 | 2020-03-23 | There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and Transfer-Encoding and Content… |
CVE-2019-17565 | Critical | 9.8 | 2020-03-23 | There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and chunked encoding. Upgrade to v… |
CVE-2019-17559 | Critical | 9.8 | 2020-03-23 | There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and scheme parsing. Upgrade to ver… |
CVE-2015-3249 | Critical | 9.8 | 2017-10-30 | The HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.1 allows remote attackers to cause a denial of service (out-of-bounds access and daem… |
CVE-2014-3624 | Critical | 9.8 | 2017-10-30 | Apache Traffic Server 5.1.x before 5.1.1 allows remote attackers to bypass access restrictions by leveraging failure to properly tunnel remap requests using CO… |
CVE-2015-5206 | Critical | 9.8 | 2017-09-13 | Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server before 5.3.x before 5.3.2 has unknown impact and attack vectors, a differ… |
CVE-2015-5168 | Critical | 9.8 | 2017-09-13 | Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.2 has unknown impact and attack vectors, a different vul… |
CVE-2026-58155 | Critical | 9.3 | 2026-07-29 | Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass. This issue affects Apache Traffic Serv… |
CVE-2026-41920 | Critical | 9.3 | 2026-07-29 | Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.1.14, from 10.0.0 through 10.1… |
CVE-2024-50306 | Critical | 9.1 | 2024-11-14 | Unchecked return value can allow Apache Traffic Server to retain privileges on startup. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.5, fr… |
CVE-2023-33934 | Critical | 9.1 | 2023-08-09 | Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1. |
CVE-2026-58154 | High | 8.9 | 2026-07-29 | Apache Traffic Server can write out of bounds or overflow integers while parsing MIME and HTTP headers. This issue affects Apache Traffic Server: from 8.0.0 t… |
CVE-2026-58157 | High | 8.7 | 2026-07-29 | Apache Traffic Server can reuse server sessions and tunnels improperly, exposing data across client connections. This issue affects Apache Traffic Server: fro… |
CVE-2026-58182 | High | 8.6 | 2026-07-29 | The Apache Traffic Server ts_lua plugin mishandles initialization, transform context, and per-instance state. This issue affects Apache Traffic Server: from 8… |