Status: UPDATED | Advisory ID: CVE-2026-24880
| CVE | CVE-2026-24880 |
| CVSS Score / Version | 7.5 (High) / CVSS v3.1 |
| Updated | 2026-09-24 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 none; integrity impact is high; availability impact is none. |
| Affected products | Apache Tomcat |
| Classified as | CWE-444 (Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')) |
| Exploitation prediction (EPSS) | 0.68% probability of exploitation in the next 30 days (51% percentile) -- FIRST.org's EPSS model. |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Apache | Tomcat |
| Subsystems | General OT |
| Sectors | Multiple |
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.
Other, unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.
Monitor Apache's web page for any future patch releases. See vendor advisory link below.
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-24880 |
| CVE | https://www.cve.org/CVERecord?id=CVE-2026-24880 |
| Vendor advisory | https://lists.apache.org/thread/2c682qnlg2tv4o5knlggqbl9yc2gb5sn |