# CVE-2026-65920: Diffusers Path Traversal via weight_map Arbitrary File Read

> Attackers can read arbitrary files by supplying malicious weight_map values in model index JSON during model loading in Hugging Face Diffusers.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Jul 2026
- **Updated:** 24 Jul 2026
- **Also known as:** GHSA-9576-hw58-7552

## What is CVE-2026-65920?

CVE-2026-65920 is a medium-severity path traversal vulnerability in huggingface diffusers, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Diffusers through 0.39.0, fixed in commit cee298c, contains a path traversal vulnerability in the _get_checkpoint_shard_files function that allows attackers to read arbitrary files by supplying malicious weight_map values in model index JSON. Attackers can use ../ sequences or absolute paths in weight_map entries to escape the model directory and read safetensors files outside the intended location during model loading.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-65920?


## How do I fix CVE-2026-65920?

No fix has been published for CVE-2026-65920 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-65920 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-65920 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-65920 and fix it if it is affected.

What it is: CVE-2026-65920 is a medium-severity path traversal vulnerability in huggingface diffusers, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-65920 exists.

Affected product: huggingface diffusers. 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-2026-65920/ (Markdown: https://insights.sbomify.com/CVE-2026-65920/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-65920
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-65920
- OSV: https://osv.dev/vulnerability/CVE-2026-65920

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-65920/
Summaries are generated and may contain mistakes; the official description above is the record.