CVE-2026-104339 Langflow OSS is affected by multiple vulnerabilities
Critical 9.8
Published
Updated
Check this codebase for CVE-2026-104339 and fix it if it is affected.
What it is: CVE-2026-104339 is a critical vulnerability in IBM Langflow OSS, published on 29 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-104339 in the wild and no public exploit code.
Affected product: IBM Langflow OSS. 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-2026-104339/ (Markdown: https://insights.sbomify.com/CVE-2026-104339/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-104339?
CVE-2026-104339 is a critical vulnerability in IBM Langflow OSS, published on 29 Oct 2026.
Official description
IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.
Weakness: CWE-94
Which versions are affected by CVE-2026-104339?
How do I fix CVE-2026-104339?
No fix has been published for CVE-2026-104339 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104339 being exploited?
There is no known exploitation of CVE-2026-104339 in the wild and no public exploit code.
Sources
Also known as GHSA-8rq9-23x9-43h7.