# CVE-2026-32685: Path Traversal in gleam docs build via documentation.pages Allows Arbitrary File Read and Write

> Attackers can read arbitrary local files and write files outside the documentation directory by tricking users into building untrusted Gleam projects.

- **Severity:** Medium 4.6 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 2 Jun 2026
- **Updated:** 8 Sep 2026
- **Also known as:** EEF-CVE-2026-32685, GHSA-wjx8-7w8m-p4v7

## What is CVE-2026-32685?

CVE-2026-32685 is a medium-severity path traversal vulnerability in Gleam, published on 2 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Path traversal vulnerability in Gleam's handling of custom documentation pages allows arbitrary file read and file write outside the intended documentation output directory.

The documentation.pages entries from gleam.toml are incorporated into filesystem paths without sufficient validation or confinement to the intended project and documentation output directories. The documentation.pages[].path field can be used to write generated documentation files outside the intended build/dev/docs/<package>/ output directory. The documentation.pages[].source field can be used to read files outside the project directory and embed their contents into generated documentation output.

An attacker who can convince a victim to run gleam docs build on an untrusted project, or with untrusted gleam.toml content, can cause local files readable by the victim to be included in generated documentation artifacts, and can cause generated documentation files to be written outside the intended docs output directory.

This issue affects Gleam from 1.16.0 until 1.17.0.

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

## Which versions are affected by CVE-2026-32685?


## How do I fix CVE-2026-32685?

Upgrade to a fixed version.

## Is CVE-2026-32685 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32685 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-32685 and fix it if it is affected.

What it is: CVE-2026-32685 is a medium-severity path traversal vulnerability in Gleam, published on 2 Jun 2026. It can only be exploited from the same machine or local network, 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-2026-32685 exists.

Affected product: Gleam. 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-2026-32685/ (Markdown: https://insights.sbomify.com/CVE-2026-32685/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-32685
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-32685
- OSV: https://osv.dev/vulnerability/CVE-2026-32685

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-32685/
Summaries are generated and may contain mistakes; the official description above is the record.