# CVE-2026-89065: Relative path traversal in the generated file manifest cleanup component in projen

> Attackers can delete files outside the project directory via crafted manifest entries in projen, requiring an upgrade to fix.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/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:** No
- **Published:** 11 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** GHSA-7p65-6x86-v7f3

## What is CVE-2026-89065?

CVE-2026-89065 is a medium-severity path traversal vulnerability in AWS projen, published on 11 Sep 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

Relative path traversal in the generated file manifest cleanup component in projen before 0.101.37 might allow context-dependent attackers to recursively delete files and directories outside the project directory that are writable by the environment running projen, via crafted entries in the version-controlled generated file manifest that is consumed during project synthesis.

To remediate this issue, users should upgrade to version 0.101.37. The corrected containment check is automatically applied by the projen runtime next time you run it.

Weakness: CWE-23 (Relative Path Traversal)

## Which versions are affected by CVE-2026-89065?


## How do I fix CVE-2026-89065?

No fix has been published for CVE-2026-89065 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-89065 being exploited?

There is no known exploitation of CVE-2026-89065 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-89065 and fix it if it is affected.

What it is: CVE-2026-89065 is a medium-severity path traversal vulnerability in AWS projen, published on 11 Sep 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: There is no known exploitation of CVE-2026-89065 in the wild and no public exploit code.

Affected product: AWS projen. 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-2026-89065/ (Markdown: https://insights.sbomify.com/CVE-2026-89065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-89065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-89065
- OSV: https://osv.dev/vulnerability/CVE-2026-89065

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-89065/
Summaries are generated and may contain mistakes; the official description above is the record.