CVE-2026-55454: critical vulnerability in appsmithorg appsmith
Appsmith: Caddy admin API exposed without authentication
Published · Updated
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.9epss 0.6%
exploitation probability
0.6%top 53% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
appsmithorg · appsmithRelated CVEs — appsmithorg appsmith
In the same product, most dangerous first.
CVE-2026-24042CRITICALAppsmith public apps can execute unpublished actions (viewMode confusion)EPSS 0.7%CVE-2026-5418MEDIUMappsmithorg appsmith Dashboard WebClientUtils.java computeDisallowedHosts server-side request forgeryEPSS 0.5%CVE-2026-50189HIGHAppsmith: RCE via Supervisord XML-RPC Admin Interface Exposed via /supervisor Caddy RouteEPSS 0.5%CVE-2026-30862CRITICALCritical Stored XSS & Privilege Escalation in AppsmithEPSS 0.5%CVE-2026-22794CRITICALAccount Takeover Vulnerability in AppsmithEPSS 0.4%CVE-2026-55455MEDIUMAppsmith: SSRF in REST API / GraphQL datasource plugins via insufficient host denylistEPSS 0.4%