CVE•Published 2026-06-24•Modified 2026-06-29•0 articles on news•4 live references•NVD data

CVE-2026-49979Appsmith · Appsmith

Vulnerability data via NVD (ingested)

CVSS v3.1

2.7

LOW

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

EPSS percentile

Exploit Prediction Scoring System · top 82% of all CVEs

Weaknesses (CWE)

CWE-209Generation of Error Message Containing Sensitive Information CWE-918Server-Side Request Forgery (SSRF)

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.

Timeline

Published 2026-06-24

Modified 2026-06-29

External references

NVD MITRE Exploit-DB VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-49979

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Appsmith Appsmith"

All exposed Appsmith Appsmith instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Appsmith"

HTTP body or banner mentions "Appsmith" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-49979