CVE-2026-55454: Appsmith is a platform to build admin panels, internal tools, and dashboards

Q: How do I fix CVE-2026-55454?

appsmith: upgrade to 2.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-55454 being exploited?

CVE-2026-55454 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-55454 affect?

CVE-2026-55454 affects appsmith. Severity is critical (CVSS 9.9). 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 lis

Q: How urgent is CVE-2026-55454?

Priority 52/100. Critical severity; Public exploit reference

This month

CRITICAL 9.9UPGRADE

CVE-2026-55454 is a critical-severity flaw (CVSS 9.9) affecting appsmith. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 S

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-749, CWE-1188
Published	2026-06-24
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: appsmith

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-24 22:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

appsmith appsmith UPGRADE

Affected: < 2.1

Fixed in: 2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy appsmith || rpm -q appsmith || appsmith --version

2. UPGRADE to 2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade appsmith

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade appsmith

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · rust-opendal-core · FIXED · 0.59.1-2.fc46 · FEDORA-2026-4607543819 · source

sudo dnf upgrade --advisory=FEDORA-2026-4607543819

Fedora ELN · velocitty · FIXED · 1.0.3-2.eln159 · FEDORA-2026-edae8cd295 · source

sudo dnf upgrade --advisory=FEDORA-2026-edae8cd295

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-55454?

appsmith: upgrade to 2.1. Exact commands for each OS are on this page.

Is CVE-2026-55454 being exploited?

CVE-2026-55454 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-55454 affect?

CVE-2026-55454 affects appsmith. Severity is critical (CVSS 9.9). 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 lis

How urgent is CVE-2026-55454?

Priority 52/100. Critical severity; Public exploit reference

Software pages

Docker vulnerabilities · Caddy vulnerabilities

Related CVEs

CVE-2026-55455 CRITICAL 9.1 UPGRADE Appsmith is a platform to build admin panels, internal tools, and dashboards
CVE-2026-50189 HIGH 7.2 UPGRADE Appsmith is a platform to build admin panels, internal tools, and dashboards
CVE-2026-49979 LOW 2.7 UPGRADE Appsmith is a platform to build admin panels, internal tools, and dashboards

References

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