What is CVE-2026-31020?

CVE-2026-31020 is a critical-severity vulnerability, classified under Code Injection. CVSS score: 9.8/10. Published 2026-09-04.

How severe is CVE-2026-31020?

Critical severity. CVSS v3 base score is 9.8 out of 10.

CVE-2026-31020

CVE-2026-31020

In DocsGPT 0.15.0 and below, the application provides a custom prompt feature that allows users to define prompt content used during chatbot interactions. This functionality renders user-supplied prompt data using Jinja templates without input sanitization or sandboxing. An unauthenticated attacker can inject malicious template expressions, leading to a server-side template injection (SSTI) vulnerability that can be exploited to achieve full remote code execution (RCE).

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-94 — Code Injection

References

Frequently asked questions

What is CVE-2026-31020?: CVE-2026-31020 is a critical-severity vulnerability, classified under Code Injection. CVSS score: 9.8/10. Published 2026-09-04.
How severe is CVE-2026-31020?: Critical severity. CVSS v3 base score is 9.8 out of 10.