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CVE-2026-102476

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.

在 Eclipse Vert.x 的版本 [5.0.0, 5.0.12]、[5.1.0, 5.1.9] 或 [5.2.0, 5.2.0] 中，Vert.x HTTP 客户端为了提高效率，依赖于一个 SSL 上下文缓存。该缓存的键应当完整反映期望 SSL 属性的全部 SSL 语义。然而，客户端在请求一个 SSL 上下文时，可能会得到一个具有更弱安全属性的 SSL 上下文。例如，客户端可能请求一个启用了主机名验证的 SSL 上下文，却实际获得一个未启用主机名验证的上下文。 受影响的组件是 io.vertx:vertx-

CVSS 9.1 · Critical EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 3

VendorProduct Version RangeStatus
Eclipse Foundation Eclipse Vert.x 5.0.0≤ 5.0.12 affected
5.1.0≤ 5.1.9 affected
5.2.0 affected
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I. Basic Information for CVE-2026-102476

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP client relies on an SSL context for efficiency purpose, the key of this cache should reflect entirely the SSL semantics of the desired SSL properties. It is possible for a client to ask for an SSL context and obtain an SSL context with weaker properties, for instance a context with hostname validation and obtain a context ignoring hostname validation. The impacted component is io.vertx:vertx-core.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse Vert.x 5.0.0 ~ 5.0.12 -

II. Public POCs for CVE-2026-102476

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III. Intelligence Information for CVE-2026-102476

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Other References for CVE-2026-102476 (2)

Same Patch Batch · Eclipse Foundation · 2026-10-14 · 8 CVEs total

CVE-2026-103415 9.3 CRITICAL TLS 1.3 客户端缓冲区溢出漏洞
CVE-2026-106464 8.7 HIGH VxWorks 库TLS空签名解析致越界
CVE-2026-106465 8.7 HIGH NetX Secure DTLS服务器存在绕过验证漏洞
CVE-2026-102479 8.7 HIGH Vert.x 5.0-5.2 HTTP请求走私漏洞
CVE-2026-102460 8.6 HIGH CVE-2026-102460
CVE-2026-103414 8.4 HIGH GUIX二进制资源加载器缓冲区溢出漏洞
CVE-2026-102471 6.9 MEDIUM CRLF header injection in vertx-mail-client allows manipulation of outgoing SMTP messages

IV. Related Vulnerabilities

Same product: Eclipse Vert.x
Same vendor: Eclipse Foundation

V. Comments for CVE-2026-102476

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