Low Info disclosure exploit reference

CVE-2026-19245 — HKUDS nanobot Login-shell Environment shell.py ExecTool._prepare_command information disclosure

A flaw has been found in HKUDS nanobot up to 0.2.1. The impacted element is the function ExecTool._prepare_command of the file nanobot/agent/tools/shell.py of the component Login-shell Environment Handler. Executing a manipulation can lead to information disclosure. The attack requires local access. The exploit has been published and may be used. Upgrading to version 0.3.0 is sufficient to resolve this issue. This patch is called 4525. The affected component should be upgraded. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: "The report concerns shell startup files reintroducing environment variables when command execution defaults to a login shell. The default was changed so exec does not use a login shell unless explicitly requested".

Published Aug 7, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

CISA SSVC: exploitation "poc"+5

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

HKUDS

Nanobot

CVSS base

3.3

Low · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (HKUDS Nanobot).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (info disclosure), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
HKUDS	Nanobot	version 0.2.0version 0.2.1	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
4.8	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
1.9	CVSS 4.0	Low	—	—	cna@vuldb.com via NIST National Vulnerability Database
3.3	CVSS 3.1	Low	1.8	1.4	cna@vuldb.com via NIST National Vulnerability Database
3.3	CVSS 3.1	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP
3.3	CVSS 3.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP
1.7	CVSS 2.0	Low	3.1	2.9	cna@vuldb.com via NIST National Vulnerability Database
1.7	CVSS 2.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-200 · Exposure of Sensitive Information

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Look for anomalous data read/export volumes and access to sensitive records.

endpoint telemetry (EDR)application logsauthentication logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · hkuds/nanobot
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 3.3
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 7, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

9 on the record

github.com/HKUDS/nanobot/releases/tag/v0.3.0
patch, NIST National Vulnerability Database
github.com/HKUDS/nanobot/pull/4525
issue-tracking, patch, NIST National Vulnerability Database
github.com/HKUDS/nanobot/issues/4518
issue-tracking, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-19245
third-party-advisory, NIST National Vulnerability Database
github.com/HKUDS/nanobot/
product, NIST National Vulnerability Database
vuldb.com/vuln/386999/cti
signature, permissions-required, NIST National Vulnerability Database
gist.github.com/YLChen-007/b25f3f185478e0b2cd0e727bf5c5ed9b
exploit, NIST National Vulnerability Database
vuldb.com/submit/865117
third-party-advisory, NIST National Vulnerability Database
vuldb.com/vuln/386999
vdb-entry, technical-description, NIST National Vulnerability Database

Elsewhere on this site

HKUDS
every CVE for this vendor

Info disclosure
same class

CWE-200
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-90809 HKUDS nanobot ExecTool shell.py ExecTool._spawn argument injection Sep 14, 2026
Medium CVE-2026-90808 HKUDS nanobot ExecTool shell.py ExecTool._spawn incomplete blacklist Sep 14, 2026
Medium CVE-2026-19244 HKUDS nanobot MCP enabledTools Scope mcp.py connect_mcp_servers access control Aug 7, 2026
Medium CVE-2026-19246 HKUDS nanobot Provider-returned Image URL image_generation.py _download_image_data_url server-side request forgery Aug 7, 2026
Medium CVE-2026-19243 HKUDS nanobot Shell Allowlist shell.py ExecTool._spawn os command injection Aug 7, 2026
High CVE-2026-48716 nanobot: Path traversal via unsanitized WhatsApp document fileName enables arbitrary file write Jun 18, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-19245 is "HKUDS nanobot Login-shell Environment shell.py ExecTool._prepare_command information disclosure", rated Low. It affects Nanobot (HKUDS); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 3.3 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.