Status: UPDATED | Advisory ID: CVE-2026-58155
| CVE | CVE-2026-58155 |
| CVSS Score / Version | 9.3 (Critical) / CVSS v3.1 |
| Updated | 2026-10-01 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is low; integrity impact is high; availability impact is none. |
| Affected products | Apache Traffic Server and Apache Software Foundation Apache Traffic Server |
| Classified as | CWE-444 (Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Apache | Traffic Server | ||
| Apache Software Foundation | Apache Traffic Server |
| Subsystems | General OT |
| Sectors | Multiple |
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 8.1.11, 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. (NVD)
Monitor Apache's and Apache Software Foundation's web pages for any future patch releases. See vendor advisory link below.
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-58155 |
| CVE | https://www.cve.org/CVERecord?id=CVE-2026-58155 |
| Vendor advisory | https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d |