Vulnerability · Published Jul 14, 2026 · Assigned by eclipse
CVE-2026-6790
Medium 5.3
In plain English
A medium-severity improper input validation in Eclipse Jetty from Eclipse Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
In Eclipse Jetty, for HTTP/1, HTTP/2 and HTTP/3 requests, there is no strict check that the request authority (host and port) matches what provided in the Host header (if present). This was not enforced in earlier HTTP RFC (for example, in RFC 2616), but it is in the latest RFC (9110 and 9112). This mismatch can cause a number of problems that may be classified as vulnerabilities such as: * URI constructions (for example, for redirects -- this is typical for login pages) * Virtual host selection * Reverse proxying * Misleading logs * Etc. Given that the latest RFCs require that request authority and Host header must match, Jetty should enforce this invariant.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | jetty12 | no fix listed | DEBIAN-CVE-2026-6790 |
| Debian:14 | jetty12 | 12.0.39-1 | DEBIAN-CVE-2026-6790 |
| Debian:12 | jetty9 | no fix listed | DEBIAN-CVE-2026-6790 |
| Debian:13 | jetty9 | no fix listed | DEBIAN-CVE-2026-6790 |
| Debian:14 | jetty9 | no fix listed | DEBIAN-CVE-2026-6790 |
| Maven | org.eclipse.jetty:jetty-server | no fix listed | GHSA-7p3p-8qv8-m2vh |
| Maven | org.eclipse.jetty:jetty-server | no fix listed | GHSA-7p3p-8qv8-m2vh |
| Maven | org.eclipse.jetty:jetty-server | no fix listed | GHSA-7p3p-8qv8-m2vh |
| Maven | org.eclipse.jetty:jetty-server | 12.0.35 | GHSA-7p3p-8qv8-m2vh |
| Maven | org.eclipse.jetty:jetty-server | 12.1.9 | GHSA-7p3p-8qv8-m2vh |
| Ubuntu:26.04:LTS | jetty12 | no fix listed | UBUNTU-CVE-2026-6790 |
| Ubuntu:26.10 | jetty12 | no fix listed | UBUNTU-CVE-2026-6790 |
| Ubuntu:22.04:LTS | jetty9 | no fix listed | UBUNTU-CVE-2026-6790 |
| Ubuntu:24.04:LTS | jetty9 | no fix listed | UBUNTU-CVE-2026-6790 |
| Ubuntu:26.04:LTS | jetty9 | no fix listed | UBUNTU-CVE-2026-6790 |
| Ubuntu:26.10 | jetty9 | no fix listed | UBUNTU-CVE-2026-6790 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Eclipse Foundation | Eclipse Jetty | 9.4.0 – through 9.4.6010.0.0 – through 10.0.2811.0.0 – through 11.0.2812.0.0 – through 12.0.3412.1.0 – through 12.1.8 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N