# CVE-2026-68771: ComfyUI 0.23.0 Unauthenticated RCE via LoadTrainingDataset Pickle Deserialization

> Unauthenticated attackers can execute arbitrary code by uploading a malicious pickle file to the ComfyUI server.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 31 Jul 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-6p72-9j26-4rmx

## What is CVE-2026-68771?

CVE-2026-68771 is a critical unsafe deserialization vulnerability in Comfy-Org ComfyUI, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ComfyUI v0.23.0 contains an unsafe deserialization vulnerability in the LoadTrainingDataset node that allows unauthenticated remote attackers to execute arbitrary Python code by uploading a crafted pickle file and triggering its deserialization. Attackers can upload a malicious shard_*.pkl file via the unauthenticated POST /upload/image endpoint and then queue a workflow graph via POST /prompt referencing the uploaded file, causing torch.load to deserialize the attacker-controlled pickle payload using __reduce__ and execute arbitrary commands as the ComfyUI process user.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-68771?


## How do I fix CVE-2026-68771?

No fix has been published for CVE-2026-68771 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-68771 being exploited?

There is no known exploitation of CVE-2026-68771 in the wild and no public exploit code.

Public exploit code:

- https://github.com/0xdak/CVE-2026-68771_exploit (github_poc): https://github.com/0xdak/CVE-2026-68771_exploit
- Security research lab — Unauthenticated RCE via insecure deserialization in ComfyUI v0.23.0 (CVSS 9.8). Isolated Docker environment, technical analysis and documentation. (github_poc): https://github.com/Oscar-Collado/comfyui-CVE-2026-68771-PoC

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-68771 and fix it if it is affected.

What it is: CVE-2026-68771 is a critical unsafe deserialization vulnerability in Comfy-Org ComfyUI, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-68771 in the wild and no public exploit code.

Affected product: Comfy-Org ComfyUI. 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-2026-68771/ (Markdown: https://insights.sbomify.com/CVE-2026-68771/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-68771
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68771
- OSV: https://osv.dev/vulnerability/CVE-2026-68771

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-68771/
Summaries are generated and may contain mistakes; the official description above is the record.