Is CVE-2026-55455 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-55455 being exploited in the wild.

How severe is CVE-2026-55455?

Informational severity, with a CVSS score of 5.3, published 24 June 2026.

Which products and versions are affected?

Appsmith Community Edition <= 2.0; Appsmith Enterprise Edition <= 2.0.

Is there a fix for CVE-2026-55455?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-55455 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-55455?

Check whether you run Appsmith Community Edition or Appsmith Enterprise Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-55455: Appsmith SSRF in REST API and GraphQL datasource plugins

Q: Is there a fix for CVE-2026-55455?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-55455 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-55455?

Check whether you run Appsmith Community Edition or Appsmith Enterprise Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-55455 · Severity: info · CVSS 5.3 · Published 2026-06-24

Appsmith, a platform for building internal business tools and dashboards, contains a security flaw in how it handles outbound web requests. An authorized user can bypass security filters to send requests to internal services running on the same server that should normally be inaccessible. This could allow an attacker to access sensitive internal configuration data or, if combined with other vulnerabilities, take control of the host server.

Technologies: Appsmith Community Edition. Vendors: Appsmith.

Quick answers

Is CVE-2026-55455 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-55455 being exploited in the wild.
How severe is CVE-2026-55455?: Informational severity, with a CVSS score of 5.3, published 24 June 2026.
Which products and versions are affected?: Appsmith Community Edition <= 2.0; Appsmith Enterprise Edition <= 2.0.
Is there a fix for CVE-2026-55455?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-55455 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-55455?: Check whether you run Appsmith Community Edition or Appsmith Enterprise Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A Server-Side Request Forgery (SSRF) vulnerability exists in Appsmith's WebClientUtils component. The outbound HTTP host filter uses an exact-match string denylist rather than comprehensive address-class validation (e.g., loopback, link-local, or any-local checks). Authenticated users can bypass these filters using alternative loopback representations like '0.0.0.0', '127.0.0.2', or '[::]'. This allows attackers to reach loopback-bound services inside the container, such as internal admin APIs. The vulnerability is fixed in version 2.1 by implementing proper IP address class resolution and validation.

Affected products

Appsmith Appsmith Community Edition <= 2.0
Appsmith Appsmith Enterprise Edition <= 2.0

Timeline

2026-06-12: advisory: GitHub Security Advisory published
2026-06-24: disclosed: CVE published to NVD

References

https://github.com/appsmithorg/appsmith/security/advisories/GHSA-m23h-pvf3-2m7p

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