SSRF via computeDisallowedHosts in Appsmith <1.99 (Dashboard)
CVE-2026-5418 Published on April 2, 2026
appsmithorg appsmith Dashboard WebClientUtils.java computeDisallowedHosts server-side request forgery
A vulnerability was identified in appsmithorg appsmith up to 1.97. Impacted is the function computeDisallowedHosts of the file app/server/appsmith-interfaces/src/main/java/com/appsmith/util/WebClientUtils.java of the component Dashboard. Such manipulation leads to server-side request forgery. The attack may be launched remotely. The exploit is publicly available and might be used. Upgrading to version 1.99 is recommended to address this issue. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Timeline
Advisory disclosed
VulDB entry created
VulDB entry last update
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-5418 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-5418
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Affected Versions
appsmithorg appsmith:- Version 1.0 is affected.
- Version 1.1 is affected.
- Version 1.2 is affected.
- Version 1.3 is affected.
- Version 1.4 is affected.
- Version 1.5 is affected.
- Version 1.6 is affected.
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- Version 1.54 is affected.
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- Version 1.64 is affected.
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- Version 1.91 is affected.
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- Version 1.93 is affected.
- Version 1.94 is affected.
- Version 1.95 is affected.
- Version 1.96 is affected.
- Version 1.97 is affected.
- Version 1.99 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.