CVE-2026-58155: CWE-444 Inconsistent Interpretation of HTTP Requests in Apache Software Foundation Apache Traffic Server
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.
AI Analysis
Technical Summary
CVE-2026-58155 is a vulnerability in Apache Traffic Server involving inconsistent interpretation of HTTP requests due to truncation of over-long header names. This behavior enables attackers to perform header aliasing, request smuggling, and bypass security policies. The affected versions include 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The vendor recommends upgrading to 9.2.15 or 10.1.4 to remediate the issue.
Potential Impact
The vulnerability can lead to request smuggling and policy bypass, which may allow attackers to interfere with HTTP request processing, potentially compromising confidentiality and integrity of communications. The CVSS score of 9.3 indicates a critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and scope change. Confidentiality impact is low, integrity impact is high, and availability is not affected.
Mitigation Recommendations
Users should upgrade Apache Traffic Server to versions 9.2.15 or 10.1.4, which contain fixes for this vulnerability. Patch status is confirmed by the vendor's recommendation to upgrade to these versions. No other mitigation steps are indicated.
CVE-2026-58155: CWE-444 Inconsistent Interpretation of HTTP Requests in Apache Software Foundation Apache Traffic Server
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.
CVSS v3.1
Score 9.3critical
Affected software
Apache Software Foundation
Apache Traffic Server
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58155 is a vulnerability in Apache Traffic Server involving inconsistent interpretation of HTTP requests due to truncation of over-long header names. This behavior enables attackers to perform header aliasing, request smuggling, and bypass security policies. The affected versions include 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The vendor recommends upgrading to 9.2.15 or 10.1.4 to remediate the issue.
Potential Impact
The vulnerability can lead to request smuggling and policy bypass, which may allow attackers to interfere with HTTP request processing, potentially compromising confidentiality and integrity of communications. The CVSS score of 9.3 indicates a critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and scope change. Confidentiality impact is low, integrity impact is high, and availability is not affected.
Mitigation Recommendations
Users should upgrade Apache Traffic Server to versions 9.2.15 or 10.1.4, which contain fixes for this vulnerability. Patch status is confirmed by the vendor's recommendation to upgrade to these versions. No other mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-29T15:45:54.687Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a69bbd69c2644c7f835ad2f
Added to database: 07/29/2026, 08:37:42 UTC
Last enriched: 07/29/2026, 10:07:17 UTC
Last updated: 09/12/2026, 10:01:32 UTC
Views: 83
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