CVE-2026-90467— aiosmtplib before 5.1.3 ESMTP Parameter Injection via unvalidated addresses
Quick assessment
Affected
cole aiosmtplib
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.
版本 5.1.3 之前的 aiosmtplib 未能正确验证调用方提供的电子邮件地址，攻击者可以将 ESMTP 参数注入到 MAIL FROM 和 RCPT TO 命令中。攻击者可以构造包含空格和尖括号的恶意地址，从而向信封命令添加 AUTH、NOTIFY 或 ORCPT 等参数，以此伪造已认证的身份，或强制向第三方发送送达通知。
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I. Basic Information for CVE-2026-90467
Vulnerability Information
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Vulnerability Title
aiosmtplib before 5.1.3 ESMTP Parameter Injection via unvalidated addresses
Source: CVE Program / CVE List V5
Vulnerability Description
aiosmtplib before 5.1.3 fails to properly validate email addresses supplied by callers, allowing attackers to inject ESMTP parameters into MAIL FROM and RCPT TO command lines. Attackers can craft malicious addresses containing spaces and angle brackets to append parameters like AUTH, NOTIFY, or ORCPT to envelope commands, forging authenticated identities or forcing delivery notifications to third parties.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| cole | aiosmtplib | 0 ~ 5.1.3 | - |
|
II. Public POCs for CVE-2026-90467
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-90467 (5)
-
Release v5.1.3 · cole/aiosmtplib · GitHub release-notes
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aiosmtplib/src/aiosmtplib/email.py at v5.1.2 · cole/aiosmtplib · GitHub technical-description
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V. Comments for CVE-2026-90467
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