Status: UPDATED | Advisory ID: CVE-2026-86350
| CVE | CVE-2026-86350 |
| CVSS Score / Version | 9.1 (Critical) / CVSS v3.1 |
| Updated | 2026-09-23 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is none. |
| Affected products | Apache Software Foundation Apache Tomcat |
| Classified as | CWE-444 (Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
| Subsystems | General OT |
| Sectors | Multiple |
Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up.
This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue. (NVD)
Monitor Apache Software Foundation's web page for any future patch releases.
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-86350 |
| CVE | https://www.cve.org/CVERecord?id=CVE-2026-86350 |