# CVE-2026-19246: HKUDS nanobot Provider-returned Image URL image_generation.py _download_image_data_url server-side request forgery

> Attacker can exploit server-side request forgery in nanobot image generation to access internal resources or bypass network restrictions.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Aug 2026
- **Updated:** 14 Aug 2026
- **Also known as:** GHSA-g4fw-p4hw-gq39

## What is CVE-2026-19246?

CVE-2026-19246 is a medium-severity server-side request forgery vulnerability in HKUDS nanobot, published on 7 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been found in HKUDS nanobot up to 0.2.1. This affects the function _download_image_data_url of the file nanobot/providers/image_generation.py of the component Provider-returned Image URL Handler. The manipulation leads to server-side request forgery. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of the patch is 5095. It is recommended to apply a patch to fix this issue. The vendor explains: "We confirm that provider-returned image URLs required the same SSRF protections applied to other network retrieval paths. (...) The patch is currently available on main and is planned for the next patch release, v0.3.1."

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-19246?


## How do I fix CVE-2026-19246?

No fix has been published for CVE-2026-19246 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19246 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19246 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19246 and fix it if it is affected.

What it is: CVE-2026-19246 is a medium-severity server-side request forgery vulnerability in HKUDS nanobot, published on 7 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19246 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-2026-19246/ (Markdown: https://insights.sbomify.com/CVE-2026-19246/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19246
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19246
- OSV: https://osv.dev/vulnerability/CVE-2026-19246

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19246/
Summaries are generated and may contain mistakes; the official description above is the record.