CVE-2026-90809Public exploitNetwork attack vectorHinoki check available

Remote command execution via partial allowlist matches

Published Sep 14, 2026 · Updated Sep 14, 2026

Argument injection in nanobot 0.2.0 through 0.2.1 allows remote attackers to execute unintended shell commands through the exec tool. ExecTool._guard_command uses a partial regular-expression match to approve the complete untrusted command string, and ExecTool._spawn then passes that unchanged string to a platform shell that interprets appended command separators. Reachability requires an enabled exec tool, a loose tools.exec.allowPatterns expression, and input that induces a tool call; injected commands run with the nanobot process privileges and within any configured sandbox.

CVSS severityUnavailable
Unscored
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Argument injection in nanobot 0.2.0 through 0.2.1 allows remote attackers to execute unintended shell commands through the exec tool. ExecTool._guard_command uses a partial regular-expression match to approve the complete untrusted command string, and ExecTool._spawn then passes that unchanged string to a platform shell that interprets appended command separators. Reachability requires an enabled exec tool, a loose tools.exec.allowPatterns expression, and input that induces a tool call; injected commands run with the nanobot process privileges and within any configured sandbox.

The record

CVE
CVE-2026-90809
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Data Intelligence Lab @ HKU
Product
nanobot
Classifications
CWE-88, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.2.0
  2. Affected versionversion=0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Data Intelligence Lab @ HKU · nanobotversion=0.2.0; version=0.2.1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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