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CVE-2026-49979

MEDIUM
5.1
CVSS 4.0
Description
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.

Metadata

CVE ID
CVE-2026-49979
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-02 18:30 UTC
Published
2026-06-24 21:38 UTC
Last updated
2026-06-24 21:38 UTC
Primary CWE
CWE-209
CWE-209: Generation of Error Message Containing Sensitive In…
Vendor / Product
appsmithorg / appsmith
Sources
cve.org  ·  NVD

Severity & Metrics

5.1 MEDIUM CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
appsmithorg appsmith — < 1.99
Weakness (CWE)
CWESourceDescription
CWE-209 cna CWE-209: Generation of Error Message Containing Sensitive Information
CWE-918 cna CWE-918: Server-Side Request Forgery (SSRF)
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.1 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
References (1)
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