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

> Local attackers can exploit shell environment handling to disclose sensitive information via unintended environment variable exposure.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Aug 2026
- **Updated:** 10 Aug 2026
- **Also known as:** GHSA-hfxr-wggc-4cr6

## What is CVE-2026-19245?

CVE-2026-19245 is a medium-severity vulnerability in HKUDS nanobot, published on 7 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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".

Weakness: CWE-284 (Improper Access Control), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-19245?


## How do I fix CVE-2026-19245?

No fix has been published for CVE-2026-19245 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19245 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19245 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19245 and fix it if it is affected.

What it is: CVE-2026-19245 is a medium-severity vulnerability in HKUDS nanobot, published on 7 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19245 exists.

Affected product: HKUDS nanobot. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-19245/ (Markdown: https://insights.sbomify.com/CVE-2026-19245/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19245
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19245
- OSV: https://osv.dev/vulnerability/CVE-2026-19245

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19245/
Summaries are generated and may contain mistakes; the official description above is the record.