CVE-2026-55454 json
Appsmith: Caddy admin API exposed without authentication
published 2026-06-24 4 mo ago modified 2026-10-25 14 d ago also BIT-appsmith-2026-55454 , EUVD-2026-39118 , GHSA-8jvv-gwqg-6vjc
- cvss
- 9.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami appsmith 2.1.0
- appsmith appsmith 2.1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/appsmithorg/appsmith/security/advisories/GHSA-8jvv-gwqg-6vjc referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| OSV | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | appsmith | <2.1.0 |
2.1.0 |
Affected products
- appsmithorg appsmith
Classification
References
-
github.com
/appsmithorg/appsmith/security/advisories/GHSA-8jvv-gwqg-6vjc
exploit, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-55454
web
Sources
- CVE List CVE-2026-55454
- NVD CVE-2026-55454
- OSV BIT-appsmith-2026-55454
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