CVE-2026-6790
Received
Received - Intake
Host Header Authority Mismatch in Eclipse Jetty
Vulnerability report for CVE-2026-6790, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-07-14
Last updated on: 2026-07-14
Assigner: Eclipse Foundation
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| eclipse | jetty | From 9.4.0 (inc) to 9.4.60 (inc) |
| eclipse | jetty | From 10.0.0 (inc) to 10.0.28 (inc) |
| eclipse | jetty | From 11.0.0 (inc) to 11.0.28 (inc) |
| eclipse | jetty | From 12.0.0 (inc) to 12.0.34 (inc) |
| eclipse | jetty | From 12.1.0 (inc) to 12.1.8 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-20 | The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. |
