CVE-2026-58155

CRITICAL

Apache Traffic Server: Header-name length truncation enables header aliasing and request smuggling

Title source: cna
STIX 2.1

Description

Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

References (1)

Core 1
Core References

Scores

CVSS v3 9.3
EPSS 0.0026
EPSS Percentile 17.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-444
Status published
Products (3)
Apache Software Foundation/Apache Traffic Server 10.0.0 - 10.1.3
Apache Software Foundation/Apache Traffic Server 8.0.0 - 8.1.9
Apache Software Foundation/Apache Traffic Server 9.0.0 - 9.2.14
Published Jul 29, 2026
Tracked Since Jul 29, 2026