CVE-2026-55454 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-55454CRITICAL

appsmithorg appsmith — Appsmith: Caddy admin API exposed without authentication

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  C  H  H  H    9.9   .0039   32.5     —

AFFECTED
  Product   Versions  Fixed
  appsmith  < 2.1 –   —

TIMELINE
  Jun 16  Reserved by GitHub_M
  Jun 24  EXPLOIT PUBLISHED — CVE-2026-55454 (appsmithorg appsmith). Public exploit reference added.
  Jun 24  Published (CNA: GitHub_M)

CWE-749, CWE-1188 · CNA: GitHub_M · CVSS v3.1 · 1 reference · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 16, 2026	Reserved	Reserved by GitHub_M
June 24, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-55454 (appsmithorg appsmith). Public exploit reference added.
June 24, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
appsmithorg	appsmith	—	< 2.1	—

Weaknesses

CWE-749 · CWE-1188

References (1)

https://github.com/appsmithorg/appsmith/security/advisories/GHSA-8jvv-gwqg-6vjc [Exploit, Third Party Advisory]

Authoritative record: CVE-2026-55454 at cve.org

Vendors: appsmithorg

Weaknesses: CWE-749 · CWE-1188

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-55454 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.