# CVE-2026-76059: Code injection in Langflow OSS

> Attackers can execute arbitrary OS commands by bypassing security scanners with crafted component code, requiring immediate patching of Langflow OSS.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 10 Sep 2026
- **Updated:** 12 Sep 2026
- **Also known as:** GHSA-xffc-qfh4-r9p6

## What is CVE-2026-76059?

CVE-2026-76059 is a high-severity code injection vulnerability in Langflow Langflow, published on 10 Sep 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 1.11.5 An attacker who could submit custom component source code could bypass the static security scanner by crafting an annotated class-body assignment that resolved to a dangerous callable through alias tracking; the resolved value was never checked against the dangerous callable blocklist due to the logic error. If the crafted component reached the runtime execution path, the attacker could cause arbitrary operating system commands to execute on the server in-process, with the privileges of the running service.

Weakness: CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2026-76059?

It affects 1 product.


Products: Langflow Langflow.

## How do I fix CVE-2026-76059?

No fix has been published for CVE-2026-76059 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76059 being exploited?

There is no known exploitation of CVE-2026-76059 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-2026-76059 and fix it if it is affected.

What it is: CVE-2026-76059 is a high-severity code injection vulnerability in Langflow Langflow, published on 10 Sep 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-2026-76059 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-2026-76059/ (Markdown: https://insights.sbomify.com/CVE-2026-76059/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76059
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76059
- OSV: https://osv.dev/vulnerability/CVE-2026-76059

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76059/
Summaries are generated and may contain mistakes; the official description above is the record.