CVE-2026-5418 appsmithorg appsmith Dashboard WebClientUtils.java computeDisallowedHosts server-side request forgery
Remote attackers can exploit a server-side request forgery flaw in Appsmith's dashboard to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5418?
CVE-2026-5418 is a medium-severity server-side request forgery vulnerability in appsmithorg appsmith, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-5418?
How do I fix CVE-2026-5418?
No fix has been published for CVE-2026-5418 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-5418 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5418 exists.
Sources
Also known as GHSA-9m89-5jw7-q5cr, GHSA-jwc6-82xv-8pp5.