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CVE-2026-102471— CRLF header injection in vertx-mail-client allows manipulation of outgoing SMTP messages

一分钟漏洞结论

影响对象
Eclipse Foundation Eclipse Vert.x
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the vertx-mail-client does not sanitize CR (\r) or LF (\n) characters in user-supplied email header names and values before writing them into the SMTP DATA section

CVSS 6.9 · Medium

影响版本矩阵 4

厂商产品 版本范围状态
Eclipse Foundation Eclipse Vert.x 4.0.0≤ 4.5.34 affected
5.0.0≤ 5.0.12 affected
5.1.0≤ 5.1.9 affected
5.2.0 affected
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一、 漏洞 CVE-2026-102471 基础信息

漏洞信息

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Vulnerability Title
CRLF header injection in vertx-mail-client allows manipulation of outgoing SMTP messages
来源: CVE Program / CVE List V5
Vulnerability Description
In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the vertx-mail-client does not sanitize CR (\r) or LF (\n) characters in user-supplied email header names and values before writing them into the SMTP DATA section. A CR/LF sequence embedded in a name or value passed to MailMessage.addHeader(), MailMessage.setHeaders(), MailAttachment.addHeader(), or MailAttachment.setHeaders() is written verbatim to the wire, allowing an attacker to inject arbitrary headers (e.g. Bcc, Reply-To, Content-Type) or prepend body content to the outgoing message. The same weakness affects MIME part metadata set via MailAttachment.setContentType(), setDisposition(), setDescription(), and setContentId(), which are written directly into MIME part headers without validation. A secondary weakness in Utils.mustEncode(char) additionally allows a bare LF in a From display-name to bypass Q-encoding and reach the wire unchanged. An unauthenticated attacker who can control any header name, header value, or attachment metadata field passed to the mail client (for example via a web form or API that feeds into MailMessage) can exploit this to redirect email copies, spoof headers, or tamper with message structure. The impacted component is io.vertx:vertx-mail-client.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
Eclipse Foundation Eclipse Vert.x 4.0.0 ~ 4.5.34 -

二、漏洞 CVE-2026-102471 的公开POC

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三、漏洞 CVE-2026-102471 的情报信息

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CVE-2026-102471 其他参考 (1)

CVE-2026-102471 其他参考 (1)

同批安全公告 · Eclipse Foundation · 2026-10-14 · 共 8 条

CVE-2026-103415 9.3 CRITICAL CVE-2026-103415
CVE-2026-102476 9.1 CRITICAL CVE-2026-102476
CVE-2026-106464 8.7 HIGH CVE-2026-106464
CVE-2026-106465 8.7 HIGH CVE-2026-106465
CVE-2026-102479 8.7 HIGH CVE-2026-102479
CVE-2026-102460 8.6 HIGH CVE-2026-102460
CVE-2026-103414 8.4 HIGH CVE-2026-103414

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-102471

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