# CVE-2026-13448: Code injection in Langflow OSS

> Unauthenticated attackers can execute arbitrary code, cause denial of service, and access credentials via insufficiently authorized API endpoints in Langflow OSS.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jul 2026
- **Updated:** 23 Jul 2026
- **Also known as:** GHSA-gqcf-9v26-p4pr

## What is CVE-2026-13448?

CVE-2026-13448 is a high-severity code injection vulnerability in Langflow Langflow, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

IBM Langflow OSS 1.0.0 through 1.10.1 Lanflow OSS contains an unauthenticated remote code execution vulnerability in the public flow build endpoint ( /api/v1/build_public_tmp/{flow_id}/flow ). The vulnerability stems from an incomplete denylist in the validate_public_flow_no_code_execution() function that fails to block several code-execution agent components including OpenDsStarAgent, CodeActAgentSmolagents, and CSVAgent.

Weakness: CWE-184 (Incomplete List of Disallowed Inputs)

## Which versions are affected by CVE-2026-13448?

It affects 1 product.


Products: Langflow Langflow.

## How do I fix CVE-2026-13448?

No fix has been published for CVE-2026-13448 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-13448 being exploited?

There is no known exploitation of CVE-2026-13448 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-2026-13448 and fix it if it is affected.

What it is: CVE-2026-13448 is a high-severity code injection vulnerability in Langflow Langflow, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-13448 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-2026-13448/ (Markdown: https://insights.sbomify.com/CVE-2026-13448/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13448
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13448
- OSV: https://osv.dev/vulnerability/CVE-2026-13448

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-13448/
Summaries are generated and may contain mistakes; the official description above is the record.