Langflow: IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote attacker to execute arbitrary code…
Langflow
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- Severity
- Critical, CVSS 9.8
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Record
- CVE-2026-81204
- Affects
- Langflow
- Known exploited
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Published
- Record first published by the source
- September 10, 2026
- Source last modified
- September 16, 2026
Description
IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote attacker to execute arbitrary code due to code injection during graph construction.
Description quoted from the NVD record.
Who is affected
This flaw affects Langflow (also called IBM Langflow OSS), a tool for building apps that use AI language models. Versions 1.0.0 through 1.11.5 are affected. The problem is in the part of the product that puts together the steps of a workflow. An attacker who can reach your Langflow over a network could sneak in their own code and make the system run it. This flaw is rated Critical.
What to do
- If someone in your organization installed or runs Langflow, that person should act on this flaw. If an IT provider or vendor runs it for you, they should act instead.
- Check which version of Langflow you use. Versions 1.0.0 through 1.11.5 are affected.
- No fixed version is named for this flaw yet, so check the vendor advisory linked on this page for a fixed release and install it as soon as one is available.
- If an IT provider or vendor runs Langflow for your organization, send them this advisory and ask when the update will be done.
Analysis written from the source record as of September 16, 2026 and reviewed before publishing.