What is CVE-2026-30862?

CVE-2026-30862 is a critical-severity vulnerability in Appsmith, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-03-10.

How severe is CVE-2026-30862?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Is CVE-2026-30862 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Appsmith

CVE-2026-30862

Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 1.96, a Critical Stored XSS vulnerability exists in the Table Widget (TableWidgetV2). The root cause is a lack of HTML sanitization in the React compone…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (23.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

Affected products

Appsmith
Appsmithorg Appsmith — versions < 1.96

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

drkim-dev/CVE-2026-30862

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-30862?: CVE-2026-30862 is a critical-severity vulnerability in Appsmith, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-03-10.
How severe is CVE-2026-30862?: Critical severity. CVSS v3 base score is 9.0 out of 10.
Is CVE-2026-30862 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.