Improper Authentication Vulnerability in Mettle Sendportal APIv1 Webhooks
CVE-2026-15192

6.9MEDIUM

Key Information:

Vendor

Mettle

Status
Sendportal
Vendor
CVE Published:
9 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-15192?

A vulnerability has been identified in Mettle Sendportal, specifically in the APIv1 Webhooks component that handles sendgrid, postmark, postal, and mailjet functionalities. This flaw results in missing authentication, allowing potential attackers to exploit the system remotely. The vulnerability has been publicly disclosed, and while the project team was notified early on through an issue report, no response has been documented. Users are advised to assess their security measures and apply patches as necessary.

Affected Version(s)

sendportal 3.0.0

sendportal 3.0.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-15192 - Proof of Concept

References

https://vuldb.com/vuln/377118
vdb-entrytechnical-description
https://vuldb.com/vuln/377118/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-15192
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Superman_04 (VulDB User)
VulDB CNA Team
.