CVE-2026-55454

Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 2.1, the bundled Caddy reverse-proxy's admin API — which has no authentication by default — is bound on 0.0.0.0:2019 inside the container. While this listener is not directly published to the host by docker-compose.yml, it is reachable from the Appsmith server process itself or a SSRF vulnerability. An authenticated low-privileged user can therefore drive the SSRF to issue POST /load (or any other admin-API call) against http://0.0.0.0:2019/, fully replacing the live Caddy configuration and taking over the reverse proxy. This vulnerability is fixed in 2.1.

Affected products

Appsmith, Caddy

Appsmith

< 2.1

Fix

Available

CVSS 3.1

9.9 CRITICAL

EPSS

0.4% (32th percentile)

Weakness

CWE-1188, CWE-749

NVD status

Analyzed

Published

2026-06-24

No exploit for CVE-2026-55454 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.