# CVE-2026-55454

## Summary

- **CVE ID:** CVE-2026-55454
- **Severity:** CRITICAL
- **CVSS Score:** 9.9 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-749, CWE-1188
- **Published:** Jun 24, 2026
- **Last Modified:** Jun 25, 2026

## Description

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

- appsmithorg — appsmith (< 2.1)

## References

- [CNA](https://github.com/appsmithorg/appsmith/security/advisories/GHSA-8jvv-gwqg-6vjc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.60%
- **EPSS Percentile:** 46.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._