{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-55454: Appsmith: Caddy admin API exposed without authentication","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-55454","status":"final","version":"1","initial_release_date":"2026-06-24T21:38:07.844Z","current_release_date":"2026-06-24T21:38:07.844Z","revision_history":[{"date":"2026-06-24T21:38:07.844Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-55454 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-55454"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-55454"},{"category":"external","summary":"https://github.com/appsmithorg/appsmith/security/advisories/GHSA-8jvv-gwqg-6vjc","url":"https://github.com/appsmithorg/appsmith/security/advisories/GHSA-8jvv-gwqg-6vjc"}]},"product_tree":{"branches":[{"category":"vendor","name":"appsmithorg","branches":[{"category":"product_name","name":"appsmith","branches":[{"category":"product_version","name":"< 2.1","product":{"name":"appsmithorg appsmith < 2.1","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:appsmithorg:appsmith:\\<_2.1:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-55454","title":"Appsmith: Caddy admin API exposed without authentication","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":9.9,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}