RCE in Hkuds Nanobot
CVE-2026-33654
nanobot is a personal AI assistant. Prior to version 0.1.6, an indirect prompt injection vulnerability exists in the email channel processing module (`nanobot/channels/email.py`), allowing a remote, unauthenticated attacker to execute arbitrary LLM instructions (and subsequently, system tools) without any interaction from the bot owner. By sending an email containing malicious prompts to the bot's monitored email address, the bot automatically polls, ingests, and processes the email content as highly trusted input, fully bypassing channel isolation and resulting in a stealthy, zero-click attack. Version 0.1.6 patches the issue.
Vulnerability class: RCE (Remote Code Execution)
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: 0.005 (43.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.005 · change: -0.002
Affected products
- Hkuds Nanobot — versions < 0.1.4.post6
- Nanobot — versions 0.1.4
Weakness classification (CWE)
References
- github.com/HKUDS/nanobot/security/advisories/GHSA-4gmr-2vc8-7qh3 (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33654?
- CVE-2026-33654 is a critical-severity vulnerability in Hkuds Nanobot, classified under Code Injection. CVSS score: 9.8/10. Published 2026-03-27.
- How severe is CVE-2026-33654?
- Critical severity. CVSS v3 base score is 9.8 out of 10.