CVE-2026-58159

Apache Traffic Server before 6.2.1 generates a coredump when there is a mismatch between content length and chunked encoding.

Apache Traffic Server versions 6.0.0 to 6.2.0 are affected by an HPACK Bomb Attack.

Unspecified vulnerability in Apache Traffic Server versions 3.x through 3.2.5, 4.x before 4.2.1.1, and 5.x before 5.0.1. This vulnerability may be related to health checks, but its impact and attack vectors are unknown.

Apache Traffic Server contains an improper access control vulnerability. This issue affects Apache Traffic Server from 9.0.0 through 9.2.14 and from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fixes the issue. This CVE supersedes CVE-2026-41920, whose record listed the affected 9.x versions as 9.0.0 through 9.1.14 and the fixed version as 9.1.15; all 9.2.x releases before 9.2.15 are affected.

The Apache Traffic Server certifier plugin generates certificates based on attacker-controlled client SNI. This issue affects Apache Traffic Server versions from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.14, and from 10.0.0 through 10.1.3.

Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass. This issue affects versions 8.0.0 through 8.1.11, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3.

Apache Traffic Server does not reject Transfer-Encoding in HTTP/2 requests, allowing downgrade request smuggling. This issue affects versions 8.0.0 through 8.1.11, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3.

Apache Traffic Server allows request smuggling when chunked messages are malformed. This issue affects versions 8.0.0 through 8.1.11, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3.

Apache Traffic Server has an Improper Access Control vulnerability. This affects versions from 9.0.0 to 9.1.14 and from 10.0.0 to 10.1.3.

Apache Traffic Server has an Improper Input Validation vulnerability. This affects versions from 9.2.0 to 9.2.14 and from 10.1.0 to 10.1.3.