What is CVE-2026-43899?

CVE-2026-43899 is a critical-severity vulnerability in Thinkinaixyz Deepchat, classified under Improper Input Validation. CVSS score: 9.6/10. Published 2026-05-11.

How severe is CVE-2026-43899?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Improper input validation in Thinkinaixyz Deepchat

CVE-2026-43899

DeepChat is an open-source artificial intelligence agent platform that unifies models, tools, and agents. Prior to v1.0.4-beta.1, An incomplete mitigation for CVE-2025-55733 leaves DeepChat vulnerable to an arbitrary protocol execution byp…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (23.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Thinkinaixyz Deepchat — versions < 1.0.4-beta.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-43899?: CVE-2026-43899 is a critical-severity vulnerability in Thinkinaixyz Deepchat, classified under Improper Input Validation. CVSS score: 9.6/10. Published 2026-05-11.
How severe is CVE-2026-43899?: Critical severity. CVSS v3 base score is 9.6 out of 10.