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CVE-2026-57511— SuperPlane < 0.30.0 SMTP Header Injection via Webhook Event Title

Quick assessment

Affected
superplanehq superplane
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.

superplanehq superplane是superplanehq组织的一款企业级项目协作平台。 superplanehq superplane 0.30.0之前版本存在输入验证错误漏洞，该漏洞源于SMTP header注入漏洞，允许未认证攻击者通过在webhook传递的事件payload标题字段中包含CRLF序列，注入任意SMTP header，可能导致内容泄露、伪造发件人地址或破坏消息体用于钓鱼。

CVSS 5.4 · Medium EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
superplanehq superplane < 0.30.0 affected
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I. Basic Information for CVE-2026-57511

Vulnerability Information
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Vulnerability Title
SuperPlane < 0.30.0 SMTP Header Injection via Webhook Event Title
Source: CVE Program / CVE List V5
Vulnerability Description
SuperPlane before 0.30.0 contains an SMTP header injection vulnerability that allows unauthenticated attackers to inject arbitrary SMTP headers by including CRLF sequences in the event payload title field delivered via webhook. Attackers can manipulate the unsanitized title field passed to the SMTP DATA command to add Bcc recipients for content exfiltration, forge the From address to bypass SPF and DKIM checks, or inject Content-Type and MIME boundary headers to corrupt message bodies for phishing.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
superplanehq superplane 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
superplanehq superplane是superplanehq组织的一款企业级项目协作平台。 superplanehq superplane 0.30.0之前版本存在输入验证错误漏洞，该漏洞源于SMTP header注入漏洞，允许未认证攻击者通过在webhook传递的事件payload标题字段中包含CRLF序列，注入任意SMTP header，可能导致内容泄露、伪造发件人地址或破坏消息体用于钓鱼。
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
superplanehq superplane 0 ~ 0.30.0 -

II. Public POCs for CVE-2026-57511

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III. Intelligence Information for CVE-2026-57511

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Patches & Fixes for CVE-2026-57511 (1)

Vendor Advisories for CVE-2026-57511 (1)

Vendor Pages for CVE-2026-57511 (1)

IV. Related Vulnerabilities

Same product: superplane
Same vendor: superplanehq
Same weakness: CWE-93

V. Comments for CVE-2026-57511

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