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VulnerabilityPublished

CVE-2026-43900: ThinkInAIXYZ deepchat · Cross-site Scripting

Affects ThinkInAIXYZ deepchatSource CVE Database V5

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Not known to be exploited · CVSS 9.3 Critical : upgrade to 1.0.4-beta.1 as a priority.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
9.3Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.0.4-beta.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade ThinkInAIXYZ deepchat to 1.0.4-beta.1.

Affected software

ProductAffectedFixed in
ThinkInAIXYZdeepchatAffected
  • <1.0.4-beta.1
Fixed in
  • 1.0.4-beta.1
GitHubthinkinaixyz/deepchatpkg:github/thinkinaixyz/deepchatOther threatsAffected
  • =1.0.4-beta.1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

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.

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.

References

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