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CVE-2026-102479

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 版本 [5.0.0, 5.0.12]、[5.1.0, 5.1.9] 或 [5.2.0, 5.2.0] 中，Vert.x 的 HTTP/1.x 解码器对已知 HTTP 头部进行规范化处理。在该规范化过程中，精心构造的 HTTP 头部可能被错误地识别为上述已知头部列表中的字段，例如将 “Content-Xength” 误解析为 “Content-Length”。 此漏洞可能被用于请求走私（Request Smuggling）攻击。 受影响的组件为：io.vertx:vertx-core

CVSS 8.7 · High EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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-2026-102479

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/1.x decoder uses a canonicalization for well known HTTP headers, the canonicalization process interprets well crafted headers as headers of this list, allowing for instance Content-Xength to be interpeted as Content-Length. This can be exploited for request smuggling purpose. The impacted component is io.vertx:vertx-core.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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-2026-102479

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III. Intelligence Information for CVE-2026-102479

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Other References for CVE-2026-102479 (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-2026-102476 9.1 CRITICAL Eclipse Vert.x SSL缓存绕过漏洞
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-2026-102460 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-2026-102479

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