CVE-2026-29141— Bounded Subject Tag Sanitization
Quick assessment
Affected
SEPPmail Secure Email Gateway
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.
SEPPmail Secure Email Gateway是德国SEPPmail公司的一个电子邮件安全网关。 SEPPmail Secure Email Gateway 15.0.3之前版本存在安全漏洞，该漏洞源于允许攻击者绕过主题清理并伪造诸如signed OK等标签。
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I. Basic Information for CVE-2026-29141
Vulnerability Information
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Vulnerability Title
Bounded Subject Tag Sanitization
Source: CVE Program / CVE List V5
Vulnerability Description
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge tags such as [signed OK].
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
SEPPmail Secure Email Gateway 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SEPPmail Secure Email Gateway是德国SEPPmail公司的一个电子邮件安全网关。 SEPPmail Secure Email Gateway 15.0.3之前版本存在安全漏洞，该漏洞源于允许攻击者绕过主题清理并伪造诸如signed OK等标签。
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 |
|---|---|---|---|---|
| SEPPmail | Secure Email Gateway | 0 ~ 15.0.3 | - |
|
II. Public POCs for CVE-2026-29141
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · SEPPmail · 2026-04-02 · 14 CVEs total
| CVE-2026-29140 | S/MIME Signature Additional Certificate | |
| CVE-2026-29135 | Webmail Password Tag Sanitization Bypass | |
| CVE-2026-29132 | ESWmail-Verify Bypass | |
| CVE-2026-29133 | UID Regex Bypass | |
| CVE-2026-29134 | GINA Domain Switch | |
| CVE-2026-29144 | Unicode Subject Tags | |
| CVE-2026-29143 | S/MIME Decryption Impersonation | |
| CVE-2026-29137 | Long Subject Untagging | |
| CVE-2026-29142 | Plaintext secure-mail.html | |
| CVE-2026-29138 | PGP Decryption Sender LDAP Injection | |
| CVE-2026-29139 | GINA State Confusion Account Takeover | |
| CVE-2026-29136 | CA Notification HTML Injection | |
| CVE-2026-29131 | PGP Decryption Recipient LDAP Injection |
IV. Related Vulnerabilities
V. Comments for CVE-2026-29141
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