Langflow: IBM Langflow OSS 1.0.0 through 1.11.1 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-2026-19286
- Affects
- Langflow
- Known exploited
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Published
- Record first published by the source
- August 28, 2026
- Source last modified
- September 1, 2026
Description
IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary code due to improper enforcement of security restrictions on the A2A public endpoint.
Description quoted from the NVD record.
Who is affected
Langflow (also called IBM Langflow OSS) is a tool for building apps that use AI language models. This flaw affects Langflow versions 1.0.0 through 1.11.1. The problem is in a public connection point of the product, known as A2A, where security restrictions are not properly enforced. Because of this, an attacker reaching it over a network could run any code they choose on the computer or server where Langflow is installed. This flaw is rated Critical.
What to do
- If someone in your organization installed or runs Langflow, that person should handle this. If an IT provider or vendor manages it for you, send them this advisory and ask when the update will be done.
- Find out which version of Langflow you use. Versions 1.0.0 through 1.11.1 are affected.
- No fixed version is named for this flaw yet, so check the vendor advisory linked on this page for a fixed release.
- Once a fixed release is available, install it on every copy of Langflow your organization runs.
Analysis written from the source record as of September 1, 2026 and reviewed before publishing.