RCE in Arc53 Docsgpt

CVE-2026-26015

DocsGPT is a GPT-powered chat for documentation. From version 0.15.0 to before version 0.16.0, an attacker accessing both the official DocsGPT website or any local and public deployment, can craft a malicious payload bypassing the "MCP test" behavior to achieve arbitrary remote code execution (RCE). This issue has been patched in version 0.16.0.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.012 (67.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-26015: held from 0.015 to 0.012.

EPSS over last 30 days · oldest: 0.015 · newest: 0.012 · change: -0.004

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-26015?
CVE-2026-26015 is a critical-severity vulnerability in Arc53 Docsgpt, classified under Command Injection. CVSS score: 9.8/10. Published 2026-04-29.
How severe is CVE-2026-26015?
Critical severity. CVSS v3 base score is 9.8 out of 10.