CVE-2026-43900: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ThinkInAIXYZ deepchat
CVE-2026-43900 is a critical Cross-Site Scripting (XSS) vulnerability in ThinkInAIXYZ deepchat versions prior to 1.0.4-beta.1. It arises from improper input neutralization during web page generation, specifically in the SVG sanitizer component. The vulnerability allows an attacker to bypass the sanitizer by using obfuscated HTML entities, leading to arbitrary JavaScript execution when a victim interacts with a crafted SVG element. This issue is fixed in version 1.0.4-beta.1.
AI Analysis
Technical Summary
ThinkInAIXYZ deepchat before version 1.0.4-beta.1 contains a Cross-Site Scripting vulnerability due to a mismatch between backend validation and frontend rendering. The SVGSanitizer component attempts to block javascript: protocols using plain-text regex but does not handle HTML entity decoding before Vue's v-html DOM insertion in the SvgArtifact.vue component. Attackers can exploit this by embedding obfuscated entities (e.g., javascript:alert(1)) in SVG artifacts, bypassing the sanitizer and enabling arbitrary JavaScript execution upon user interaction with the SVG element. The vulnerability has a CVSS 3.1 score of 9.3 (critical) and is resolved in version 1.0.4-beta.1.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the victim's browser session when interacting with a malicious SVG element. This can lead to complete compromise of confidentiality and integrity of user data within the affected application. Availability is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in ThinkInAIXYZ deepchat version 1.0.4-beta.1. Users should upgrade to this version or later to remediate the issue. No other official remediation or temporary fixes are documented. Patch status is not explicitly confirmed beyond the fix in version 1.0.4-beta.1; users should verify with the vendor for the latest advisory.
CVE-2026-43900: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ThinkInAIXYZ deepchat
Description
CVE-2026-43900 is a critical Cross-Site Scripting (XSS) vulnerability in ThinkInAIXYZ deepchat versions prior to 1.0.4-beta.1. It arises from improper input neutralization during web page generation, specifically in the SVG sanitizer component. The vulnerability allows an attacker to bypass the sanitizer by using obfuscated HTML entities, leading to arbitrary JavaScript execution when a victim interacts with a crafted SVG element. This issue is fixed in version 1.0.4-beta.1.
CVSS v3.1
Score 9.3critical
Affected software
pkg:github/thinkinaixyz/deepchatRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
ThinkInAIXYZ deepchat before version 1.0.4-beta.1 contains a Cross-Site Scripting vulnerability due to a mismatch between backend validation and frontend rendering. The SVGSanitizer component attempts to block javascript: protocols using plain-text regex but does not handle HTML entity decoding before Vue's v-html DOM insertion in the SvgArtifact.vue component. Attackers can exploit this by embedding obfuscated entities (e.g., javascript:alert(1)) in SVG artifacts, bypassing the sanitizer and enabling arbitrary JavaScript execution upon user interaction with the SVG element. The vulnerability has a CVSS 3.1 score of 9.3 (critical) and is resolved in version 1.0.4-beta.1.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the victim's browser session when interacting with a malicious SVG element. This can lead to complete compromise of confidentiality and integrity of user data within the affected application. Availability is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in ThinkInAIXYZ deepchat version 1.0.4-beta.1. Users should upgrade to this version or later to remediate the issue. No other official remediation or temporary fixes are documented. Patch status is not explicitly confirmed beyond the fix in version 1.0.4-beta.1; users should verify with the vendor for the latest advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-04T16:11:33.085Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a028743cbff5d86108b506b
Added to database: 05/12/2026, 01:49:55 UTC
Last enriched: 05/19/2026, 11:01:09 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 70
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