Quick answers
- Is CVE-2026-78571 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78571 being exploited in the wild.
- How severe is CVE-2026-78571?
- High severity, with a CVSS score of 8.8, published 10 September 2026.
- Which products and versions are affected?
- IBM Langflow 1.0.0 through 1.11.5.
- Is there a fix for CVE-2026-78571?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-78571 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-78571?
- Check whether you run Langflow. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a code injection flaw (CWE-94) in the lfx CodeParser component, which passes return-type annotation source directly to eval() without sanitization. An authenticated attacker can craft malicious input containing arbitrary Python code that gets evaluated server-side with the privileges of the application process. This bypasses code-execution restrictions and allows direct execution of arbitrary Python code. The attack requires authentication and network access to the Langflow server. IBM has published security advisories identifying multiple related code-execution vulnerabilities in Langflow 1.0.0 through 1.11.5.
Affected products
- IBM Langflow 1.0.0 through 1.11.5
Timeline
- 2026-09-10: disclosed