CVE WatchJul 14, 2026

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 al

CVSS

7.5

High

EPSS

0.1%

KEV

—

Exploit Today

0-100

Published: Jul 14, 2026 · Last modified: Jul 14, 2026 · CWE-200 · CWE-346

EPSS · 30d

0.1%EPSS · 30 days0.2%

2026-07-142026-07-16

Technical description

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.

Official references

gitlab.eclipse.orghttps://gitlab.eclipse.org/security/cve-assignment/-/work_items/161

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