CVE-2026-6790

MEDIUM

5.3

CVSS Score

Published: July 14, 2026 at 08:51 AM UTC

Updated: October 24, 2026 at 09:10 PM UTC

2 products affected across 2 vendorsJettyJetty

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Jetty · Eclipsemaven

95%

All versions10.0.0 ≤ v < 10.0.2911.0.0 ≤ v < 11.0.2912.0.0 ≤ v < 12.0.3512.1.0 ≤ v < 12.1.99.4.0 ≤ v < 9.4.6110.0.0 11.0.0 12.0.0 12.1.0 9.4.0

Affected range stops below 10.0.29, so it looks safe — our inference, not a vendor statement

Affected range stops below 11.0.29, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.0.35, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.4.61, so it looks safe — our inference, not a vendor statement

Jetty · Jetty

70%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/99

References (1)

Vendor Advisory

Source: [email protected]

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/99

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMeclipse

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-20

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