CVE-2026-10561 Unauthenticated Remote Code Execution in Langflow OSS PythonREPLComponent via Builtins Injection
Unauthenticated attackers can execute arbitrary code on IBM Langflow OSS via builtins injection in the PythonREPLComponent, leading to full system compromise.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-10561?
CVE-2026-10561 is a critical code injection vulnerability in Langflow Langflow, published on 22 Jun 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 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise
Weakness: CWE-94
Which versions are affected by CVE-2026-10561?
3 open source packages ship an affected version, including langflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
langflow PyPI | All versions | 1.10.1 |
langflow PyPI | All versions | 1.10.1 |
langflow PyPI | All versions | 1.10.1 |
Products include Langflow Langflow.
How do I fix CVE-2026-10561?
Upgrade langflow to 1.10.1 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-10561 being exploited?
There is no known exploitation of CVE-2026-10561 in the wild and no public exploit code.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-8qpj-27x8-pwpq, PYSEC-2026-4231.