CVE-2026-33654
Zero-Click Indirect Prompt Injection and Authentication Bypass via Email Polling
Description
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.
INFO
Published Date :
March 27, 2026, 8:16 p.m.
Last Modified :
April 8, 2026, 3:19 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Nanobot to version 0.1.6 or later.
- Review email processing for untrusted input validation.
- Implement stricter channel isolation for LLM input.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33654.
| URL | Resource |
|---|---|
| https://github.com/HKUDS/nanobot/security/advisories/GHSA-4gmr-2vc8-7qh3 | Exploit Mitigation Vendor Advisory |
| https://github.com/HKUDS/nanobot/security/advisories/GHSA-4gmr-2vc8-7qh3 | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33654 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33654
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33654 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33654 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:nanobot:nanobot:*:*:*:*:*:python:*:* versions up to (excluding) 0.1.4 *cpe:2.3:a:nanobot:nanobot:0.1.4:-:*:*:*:python:*:* *cpe:2.3:a:nanobot:nanobot:0.1.4:post1:*:*:*:python:*:* *cpe:2.3:a:nanobot:nanobot:0.1.4:post2:*:*:*:python:*:* *cpe:2.3:a:nanobot:nanobot:0.1.4:post3:*:*:*:python:*:* *cpe:2.3:a:nanobot:nanobot:0.1.4:post4:*:*:*:python:*:* *cpe:2.3:a:nanobot:nanobot:0.1.4:post5:*:*:*:python:*:* Added Reference Type CISA-ADP: https://github.com/HKUDS/nanobot/security/advisories/GHSA-4gmr-2vc8-7qh3 Types: Exploit, Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/HKUDS/nanobot/security/advisories/GHSA-4gmr-2vc8-7qh3 Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 30, 2026
Action Type Old Value New Value Added Reference https://github.com/HKUDS/nanobot/security/advisories/GHSA-4gmr-2vc8-7qh3 -
New CVE Received by [email protected]
Mar. 27, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-94 Added CWE CWE-290 Added CWE CWE-1336 Added Reference https://github.com/HKUDS/nanobot/security/advisories/GHSA-4gmr-2vc8-7qh3