Is CVE-2026-43900 actively exploited?

No active exploitation of CVE-2026-43900 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-43900 be exploited remotely?

Yes. CVE-2026-43900 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-43900?

CVE-2026-43900 has a CVSS score of 9.3 (CRITICAL).

HOME VULNERABILITIESCVE-2026-43900

CRITICAL

CVE-2026-43900

CWE-79Published: May 11, 2026· Updated: May 12, 2026

9.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.3th

Official Description

DeepChat is an open-source artificial intelligence agent platform that unifies models, tools, and agents. Prior to v1.0.4-beta.1, a Cross-Site Scripting (XSS) vulnerability exists due to a discrepancy between the backend validation layer and the frontend browser rendering engine. The SVGSanitizer (src/main/lib/svgSanitizer.ts) restricts script execution by scrubbing javascript: protocols using plain-text regular expressions. However, it fails to account for HTML entity decoding prior to Vue's v-html DOM insertion inside the SvgArtifact.vue component. By feeding an SVG artifact with obfuscated entities (e.g., javascript:alert(1)), an attacker can completely bypass the sanitizer, culminating in arbitrary JavaScript execution when a victim interacts with the rendered SVG Element. This vulnerability is fixed in v1.0.4-beta.1.

NVD Source

Technical Analysis

CVE-2026-43900 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.3.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.