Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 5.0%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-15075
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cpe:2.3:a:eclipse:vert.x:3.0.0
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cpe:2.3:a:eclipse:vert.x:3.1.0
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cpe:2.3:a:eclipse:vert.x:3.2.0
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cpe:2.3:a:eclipse:vert.x:3.2.1
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cpe:2.3:a:eclipse:vert.x:3.3.0
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cpe:2.3:a:eclipse:vert.x:3.3.1
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cpe:2.3:a:eclipse:vert.x:3.3.2
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cpe:2.3:a:eclipse:vert.x:3.3.3
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cpe:2.3:a:eclipse:vert.x:3.4.0
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cpe:2.3:a:eclipse:vert.x:3.4.1
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cpe:2.3:a:eclipse:vert.x:3.4.2
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cpe:2.3:a:eclipse:vert.x:3.5.0
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cpe:2.3:a:eclipse:vert.x:3.5.1
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cpe:2.3:a:eclipse:vert.x:3.5.2
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cpe:2.3:a:eclipse:vert.x:3.5.3
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cpe:2.3:a:eclipse:vert.x:3.5.4
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cpe:2.3:a:eclipse:vert.x:3.6.0
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cpe:2.3:a:eclipse:vert.x:3.6.1
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cpe:2.3:a:eclipse:vert.x:3.6.2
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cpe:2.3:a:eclipse:vert.x:3.6.3
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cpe:2.3:a:eclipse:vert.x:3.7.0
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cpe:2.3:a:eclipse:vert.x:3.7.1
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cpe:2.3:a:eclipse:vert.x:3.8.0
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cpe:2.3:a:eclipse:vert.x:3.8.1
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cpe:2.3:a:eclipse:vert.x:3.8.2
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cpe:2.3:a:eclipse:vert.x:3.8.3
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cpe:2.3:a:eclipse:vert.x:3.8.4
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cpe:2.3:a:eclipse:vert.x:3.8.5
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cpe:2.3:a:eclipse:vert.x:3.9.0
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cpe:2.3:a:eclipse:vert.x:3.9.1
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cpe:2.3:a:eclipse:vert.x:3.9.2
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cpe:2.3:a:eclipse:vert.x:3.9.3
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cpe:2.3:a:eclipse:vert.x:3.9.4
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cpe:2.3:a:eclipse:vert.x:3.9.5
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cpe:2.3:a:eclipse:vert.x:3.9.6
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cpe:2.3:a:eclipse:vert.x:3.9.7
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cpe:2.3:a:eclipse:vert.x:4.0.0
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cpe:2.3:a:eclipse:vert.x:4.0.1
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cpe:2.3:a:eclipse:vert.x:4.0.2
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cpe:2.3:a:eclipse:vert.x:4.0.3
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cpe:2.3:a:eclipse:vert.x:4.1.0
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cpe:2.3:a:eclipse:vert.x:4.1.1
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cpe:2.3:a:eclipse:vert.x:4.1.2
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cpe:2.3:a:eclipse:vert.x:4.1.3
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cpe:2.3:a:eclipse:vert.x:4.1.4
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cpe:2.3:a:eclipse:vert.x:4.1.5
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cpe:2.3:a:eclipse:vert.x:4.1.6
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cpe:2.3:a:eclipse:vert.x:4.1.7
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cpe:2.3:a:eclipse:vert.x:4.1.8
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cpe:2.3:a:eclipse:vert.x:4.2.0
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cpe:2.3:a:eclipse:vert.x:4.2.1
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cpe:2.3:a:eclipse:vert.x:4.2.2
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cpe:2.3:a:eclipse:vert.x:4.2.3
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cpe:2.3:a:eclipse:vert.x:4.2.4
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cpe:2.3:a:eclipse:vert.x:4.2.5
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cpe:2.3:a:eclipse:vert.x:4.2.6
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cpe:2.3:a:eclipse:vert.x:4.2.7
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cpe:2.3:a:eclipse:vert.x:4.3.0
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cpe:2.3:a:eclipse:vert.x:4.3.1
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cpe:2.3:a:eclipse:vert.x:4.3.2
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cpe:2.3:a:eclipse:vert.x:4.3.3
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cpe:2.3:a:eclipse:vert.x:4.3.4
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cpe:2.3:a:eclipse:vert.x:4.3.5
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cpe:2.3:a:eclipse:vert.x:4.3.6
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cpe:2.3:a:eclipse:vert.x:4.3.7
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cpe:2.3:a:eclipse:vert.x:4.3.8
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cpe:2.3:a:eclipse:vert.x:4.4.0
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cpe:2.3:a:eclipse:vert.x:4.4.1
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cpe:2.3:a:eclipse:vert.x:4.4.2
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cpe:2.3:a:eclipse:vert.x:4.4.3
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cpe:2.3:a:eclipse:vert.x:4.4.4
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cpe:2.3:a:eclipse:vert.x:4.4.5
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cpe:2.3:a:eclipse:vert.x:4.4.6
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cpe:2.3:a:eclipse:vert.x:4.4.7
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cpe:2.3:a:eclipse:vert.x:4.4.8
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cpe:2.3:a:eclipse:vert.x:4.4.9
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cpe:2.3:a:eclipse:vert.x:4.5.0
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cpe:2.3:a:eclipse:vert.x:4.5.1
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cpe:2.3:a:eclipse:vert.x:4.5.10
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cpe:2.3:a:eclipse:vert.x:4.5.11
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cpe:2.3:a:eclipse:vert.x:4.5.12
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cpe:2.3:a:eclipse:vert.x:4.5.13
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cpe:2.3:a:eclipse:vert.x:4.5.14
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cpe:2.3:a:eclipse:vert.x:4.5.15
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cpe:2.3:a:eclipse:vert.x:4.5.16
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cpe:2.3:a:eclipse:vert.x:4.5.17
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cpe:2.3:a:eclipse:vert.x:4.5.18
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cpe:2.3:a:eclipse:vert.x:4.5.19
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cpe:2.3:a:eclipse:vert.x:4.5.2
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cpe:2.3:a:eclipse:vert.x:4.5.20
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cpe:2.3:a:eclipse:vert.x:4.5.21
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cpe:2.3:a:eclipse:vert.x:4.5.22
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cpe:2.3:a:eclipse:vert.x:4.5.23
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cpe:2.3:a:eclipse:vert.x:4.5.24
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cpe:2.3:a:eclipse:vert.x:4.5.25
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cpe:2.3:a:eclipse:vert.x:4.5.26
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cpe:2.3:a:eclipse:vert.x:4.5.27
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cpe:2.3:a:eclipse:vert.x:4.5.28
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cpe:2.3:a:eclipse:vert.x:4.5.29
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cpe:2.3:a:eclipse:vert.x:4.5.3
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cpe:2.3:a:eclipse:vert.x:4.5.4
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cpe:2.3:a:eclipse:vert.x:4.5.5
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cpe:2.3:a:eclipse:vert.x:4.5.6
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cpe:2.3:a:eclipse:vert.x:4.5.7
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cpe:2.3:a:eclipse:vert.x:4.5.8
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cpe:2.3:a:eclipse:vert.x:4.5.9
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cpe:2.3:a:eclipse:vert.x:5.0.0
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cpe:2.3:a:eclipse:vert.x:5.0.1
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cpe:2.3:a:eclipse:vert.x:5.0.10
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cpe:2.3:a:eclipse:vert.x:5.0.11
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cpe:2.3:a:eclipse:vert.x:5.0.12
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cpe:2.3:a:eclipse:vert.x:5.0.2
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cpe:2.3:a:eclipse:vert.x:5.0.3
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cpe:2.3:a:eclipse:vert.x:5.0.4
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cpe:2.3:a:eclipse:vert.x:5.0.5
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cpe:2.3:a:eclipse:vert.x:5.0.6
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cpe:2.3:a:eclipse:vert.x:5.0.7
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cpe:2.3:a:eclipse:vert.x:5.0.8
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cpe:2.3:a:eclipse:vert.x:5.0.9
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cpe:2.3:a:eclipse:vert.x:5.1.0
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cpe:2.3:a:eclipse:vert.x:5.1.1
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cpe:2.3:a:eclipse:vert.x:5.1.2
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cpe:2.3:a:eclipse:vert.x:5.1.3
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cpe:2.3:a:eclipse:vert.x:5.1.4