# CVE-2026-118649: n8n before 2.43.5 and 2.44.1 Authorization Bypass via Crafted Workflow ID in Data Tables


- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 28 Oct 2026
- **Updated:** 29 Oct 2026
- **Also known as:** GHSA-2rqj-qr72-7wwx, GHSA-wvjj-qg37-pv73

## What is CVE-2026-118649?

CVE-2026-118649 is a high-severity vulnerability in n8n-io n8n, published on 28 Oct 2026. 

### Official description

n8n before 2.43.5 and 2.44.x before 2.44.1 accepts a client-supplied workflow ID and caches each workflow's owner project in memory by that ID, so a crafted ID such as __proto__ makes the Data Table project check match every project. An authenticated member who can create and run workflows can list, read, modify, and delete Data Table rows in all projects of the instance.

Weakness: CWE-1321 (Improperly Controlled Modification of Object Prototype Attributes)

## Which versions are affected by CVE-2026-118649?


## How do I fix CVE-2026-118649?

No fix has been published for CVE-2026-118649 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-118649 being exploited?

There is no known exploitation of CVE-2026-118649 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-118649 and fix it if it is affected.

What it is: CVE-2026-118649 is a high-severity vulnerability in n8n-io n8n, published on 28 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-118649 in the wild and no public exploit code.

Affected product: n8n-io n8n. 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-2026-118649/ (Markdown: https://insights.sbomify.com/CVE-2026-118649/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-118649
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-118649
- OSV: https://osv.dev/vulnerability/CVE-2026-118649

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-118649/
Summaries are generated and may contain mistakes; the official description above is the record.