CVE-2026-15075

In Eclipse Vert.x versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), DefaultRedirectHandler (vertx-core) propagates all request headers as-is across cross-origin HTTP 30x redirects. Only Content-Length is stripped; no origin comparison (scheme, host, port) is performed before copying headers to the redirect target. As a result, credential headers, including Authorization, Cookie, Proxy-Authorization, and arbitrary custom headers such as X-API-Token, are forwarded to the redirect destination without the caller's knowledge. An attacker who can cause a Vert.x HttpClient to issue a request that is redirected to an attacker-controlled host (for example, by supplying a URL to a webhook dispatcher, image proxy, or microservice URL fetcher) can capture bearer tokens, basic-auth credentials, session cookies, and API keys attached to the original request.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/161	Issue Tracking

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:eclipse:vert.x::::::::
	cpe:2.3:a:eclipse:vert.x::::::::

History

14 Jul 2026, 20:53

Type	Values Removed	Values Added
CPE		cpe:2.3:a:eclipse:vert.x::::::::
First Time		Eclipse vert.x Eclipse
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://gitlab.eclipse.org/security/cve-assignment/-/work_items/161 -~~	() https://gitlab.eclipse.org/security/cve-assignment/-/work_items/161 - Issue Tracking

14 Jul 2026, 09:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-14 09:16

Updated : 2026-07-14 20:53

NVD link : CVE-2026-15075

Mitre link : CVE-2026-15075

CVE.ORG link : CVE-2026-15075

JSON object : View

Products Affected

eclipse

vert.x

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-346

Origin Validation Error

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