# CVE-2026-10547: Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement

> Authenticated users can inject arbitrary graph data into shared caches, leading to unauthorized workflow execution or denial of service.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Aug 2026
- **Updated:** 5 Aug 2026
- **Also known as:** GHSA-f7wm-r5v3-mxr4

## What is CVE-2026-10547?

CVE-2026-10547 is a medium-severity missing authorization vulnerability in Langflow Langflow, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph data into a shared cache for any flow. This may result in cross-user cache pollution, unauthorized workflow execution, or denial of service.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-10547?

It affects 1 product.


Products: Langflow Langflow.

## How do I fix CVE-2026-10547?

No fix has been published for CVE-2026-10547 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-10547 being exploited?

There is no known exploitation of CVE-2026-10547 in the wild and no public exploit code.

## Other vulnerabilities in Langflow Langflow

- [CVE-2026-9198](https://insights.sbomify.com/CVE-2026-9198/): IBM Langflow Code Injection (critical 9.8, exploited in the wild)
- [CVE-2026-0770](https://insights.sbomify.com/CVE-2026-0770/): Langflow Inclusion of Functionality from Untrusted Control Sphere (critical 9.8, exploited in the wild)
- [CVE-2025-3248](https://insights.sbomify.com/CVE-2025-3248/): Langflow Missing Authentication (critical 9.8, exploited in the wild)
- [CVE-2025-34291](https://insights.sbomify.com/CVE-2025-34291/): Langflow Origin Validation Error (critical 9.4, exploited in the wild)
- [CVE-2026-33017](https://insights.sbomify.com/CVE-2026-33017/): Langflow Code Injection (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-10547 and fix it if it is affected.

What it is: CVE-2026-10547 is a medium-severity missing authorization vulnerability in Langflow Langflow, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-10547 in the wild and no public exploit code.

Affected product: Langflow Langflow. 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-2026-10547/ (Markdown: https://insights.sbomify.com/CVE-2026-10547/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-10547
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10547
- OSV: https://osv.dev/vulnerability/CVE-2026-10547

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-10547/
Summaries are generated and may contain mistakes; the official description above is the record.