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CVE-2026-15076

Quick assessment

Affected
Eclipse Foundation Eclipse Vert.x
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Eclipse vert.x是美国Eclipse基金会开源的一个反应式应用开发框架。 Eclipse Vert.x 4.5.29及之前版本和5.1.4及之前版本存在输入验证错误漏洞，该漏洞源于WebClientSession组件未验证Set-Cookie响应头的Domain属性与原始服务器域是否匹配，违反RFC 6265第5.3节，可能导致攻击者注入任意第三方域的cookie，由于会话存储不执行跨域所有权检查，存储后可将该cookie发送至目标域，导致接收服务在攻击者账户下处理请求，攻击者可通过其自身账户

AI Predicted 8.1 Difficulty: Easy EPSS 0.20% · P8

Possible ATT&CK Techniques 1 AI

T1041 · Exfiltration Over C2 Channel

Affected Version Matrix 2

VendorProduct Version RangeStatus
Eclipse Foundation Eclipse Vert.x 4.0.0≤ 4.5.29 affected
5.0.0≤ 5.1.4 affected
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I. Basic Information for CVE-2026-15076

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), the WebClientSession component of Eclipse Vert.x Web Client does not validate that the Domain attribute of a Set-Cookie response header matches the originating server's domain, in violation of RFC 6265 section 5.3. An attacker who controls any server that the victim application contacts can inject a cookie scoped to an arbitrary third-party domain; because the session store performs no cross-domain ownership check, it stores and later transmits that cookie to the targeted domain. When the victim application subsequently sends a request to the targeted domain using the same WebClientSession, it presents the attacker-injected cookie, causing the receiving service to process the request under the attacker's account. Sensitive data included in the victim application's requests, such as payment amounts, card details, or other API payloads, may then be accessible to the attacker through their own account on that service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Eclipse Vert.x 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eclipse vert.x是美国Eclipse基金会开源的一个反应式应用开发框架。 Eclipse Vert.x 4.5.29及之前版本和5.1.4及之前版本存在输入验证错误漏洞，该漏洞源于WebClientSession组件未验证Set-Cookie响应头的Domain属性与原始服务器域是否匹配，违反RFC 6265第5.3节，可能导致攻击者注入任意第三方域的cookie，由于会话存储不执行跨域所有权检查，存储后可将该cookie发送至目标域，导致接收服务在攻击者账户下处理请求，攻击者可通过其自身账户
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse Vert.x 4.0.0 ~ 4.5.29 -

II. Public POCs for CVE-2026-15076

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III. Intelligence Information for CVE-2026-15076

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Other References for CVE-2026-15076 (1)

Same Patch Batch · Eclipse Foundation · 2026-07-14 · 10 CVEs total

CVE-2026-57898 9.0 CRITICAL Eclipse BaSyx Java Server SDK 路径遍历漏洞
CVE-2024-7708 7.5 HIGH Eclipse Jetty 资源管理错误漏洞
CVE-2026-12606 6.3 MEDIUM Eclipse Glassfish 输入验证错误漏洞
CVE-2026-6790 5.3 MEDIUM Eclipse Jetty 输入验证错误漏洞
CVE-2026-8384 5.3 MEDIUM Eclipse jetty 授权问题漏洞
CVE-2026-13699 4.3 MEDIUM Databroker 0.6.1 PublishValue missing data_point panic
CVE-2026-15075 Eclipse vert.x 信息泄露漏洞
CVE-2026-9561 Eclipse kura 输入验证错误漏洞
CVE-2026-10051 Eclipse Jetty 信息泄露漏洞

IV. Related Vulnerabilities

Same product: Eclipse Vert.x
Same vendor: Eclipse Foundation
Same weakness: CWE-346

V. Comments for CVE-2026-15076

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