CVE-2026-49979

Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 1.99, the POST /api/v1/admin/send-test-email endpoint accepts attacker-controlled smtpHost and smtpPort values and establishes a raw JavaMail TCP connection without any IP validation. This completely bypasses WebClientUtils.IP_CHECK_FILTER, which only applies to Spring WebClient HTTP requests. Additionally, the raw MailException.getMessage() is returned verbatim in the API error response, enabling error-based internal port scanning and service banner enumeration. This vulnerability is fixed in 1.99.

CVSS v3 2.7 LOW

2.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/appsmithorg/appsmith/security/advisories/GHSA-vvxf-f8q9-86gh	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:appsmith:appsmith:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-24 22:16

Updated : 2026-06-29 16:06

NVD link : CVE-2026-49979

Mitre link : CVE-2026-49979

CVE.ORG link : CVE-2026-49979

JSON object : View

Products Affected

appsmith

appsmith

CWE

CWE-209

Generation of Error Message Containing Sensitive Information

CWE-918

Server-Side Request Forgery (SSRF)

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