CVE-2026-58150: CWE-444 Inconsistent Interpretation of HTTP Requests in Apache Software Foundation Apache Traffic Server
Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3 contain a vulnerability where Transfer-Encoding headers in HTTP/2 requests are not rejected. This flaw allows for downgrade request smuggling attacks. The issue is fixed in versions 9.2.15 and 10.1.4. The vulnerability has a critical CVSS score of 10.0.
AI Analysis
Technical Summary
CVE-2026-58150 is a vulnerability in Apache Traffic Server that arises from inconsistent interpretation of HTTP requests (CWE-444). Specifically, the server does not reject Transfer-Encoding headers in HTTP/2 requests, which can be exploited to perform downgrade request smuggling attacks. 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. Upgrading to versions 9.2.15 or 10.1.4 resolves the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to perform HTTP request smuggling by exploiting the inconsistent handling of Transfer-Encoding headers in HTTP/2 requests. This can lead to bypassing security controls, request/response desynchronization, and potentially unauthorized actions. The CVSS score of 10.0 indicates a critical impact with high confidentiality and integrity impact and no required privileges or user interaction.
Mitigation Recommendations
Users should upgrade Apache Traffic Server to version 9.2.15 or 10.1.4, where this vulnerability is fixed. Patch status is confirmed by the vendor's recommended upgrade versions. No alternative mitigations are specified.
CVE-2026-58150: CWE-444 Inconsistent Interpretation of HTTP Requests in Apache Software Foundation Apache Traffic Server
Description
Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3 contain a vulnerability where Transfer-Encoding headers in HTTP/2 requests are not rejected. This flaw allows for downgrade request smuggling attacks. The issue is fixed in versions 9.2.15 and 10.1.4. The vulnerability has a critical CVSS score of 10.0.
CVSS v3.1
Score 10.0critical
Affected software
Apache Software Foundation
Apache Traffic Server
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58150 is a vulnerability in Apache Traffic Server that arises from inconsistent interpretation of HTTP requests (CWE-444). Specifically, the server does not reject Transfer-Encoding headers in HTTP/2 requests, which can be exploited to perform downgrade request smuggling attacks. 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. Upgrading to versions 9.2.15 or 10.1.4 resolves the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to perform HTTP request smuggling by exploiting the inconsistent handling of Transfer-Encoding headers in HTTP/2 requests. This can lead to bypassing security controls, request/response desynchronization, and potentially unauthorized actions. The CVSS score of 10.0 indicates a critical impact with high confidentiality and integrity impact and no required privileges or user interaction.
Mitigation Recommendations
Users should upgrade Apache Traffic Server to version 9.2.15 or 10.1.4, where this vulnerability is fixed. Patch status is confirmed by the vendor's recommended upgrade versions. No alternative mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-29T15:31:25.334Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a69adc89c2644c7f825aaba
Added to database: 07/29/2026, 07:37:44 UTC
Last enriched: 08/05/2026, 14:47:39 UTC
Last updated: 09/10/2026, 20:00:33 UTC
Views: 85
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