CVE-2026-43900Public exploitNetwork attack vector

Client-side script execution via entity-obfuscated SVG links

Published May 11, 2026 · Updated May 11, 2026

DOM XSS in ThinkInAIXYZ DeepChat before 1.0.4-beta.1 allows remote attackers to execute JavaScript through crafted SVG artifacts. SVGSanitizer matches literal javascript: text but does not account for HTML entity decoding before SvgArtifact.vue inserts the result with v-html. Execution requires a malicious or compromised custom LLM response and victim interaction with the rendered SVG, exposing client state to the injected script.

CVSS severity9.3
Critical
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM XSS in ThinkInAIXYZ DeepChat before 1.0.4-beta.1 allows remote attackers to execute JavaScript through crafted SVG artifacts. SVGSanitizer matches literal javascript: text but does not account for HTML entity decoding before SvgArtifact.vue inserts the result with v-html. Execution requires a malicious or compromised custom LLM response and victim interaction with the rendered SVG, exposing client state to the injected script.

The record

CVE
CVE-2026-43900
Published
May 11, 2026
Updated
May 11, 2026
Vendor
ThinkInAIXYZ
Product
DeepChat
Classifications
CWE-116, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.4-beta.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ThinkInAIXYZ · DeepChatversion=< 1.0.4-beta.1

Published CVSS scores

9.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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