high CVSS 8.1

CVE-2026-9196·Python vulnerability

IBM Langflow OSS 1.0.0 through 1.10.3 could allow an authenticated attacker to execute unintended code during Agentic Assistant validation due to improper handling of LLM‑generated components. The application executes model‑generated Python code in the backend during validation prior to user approval, which may allow an attacker to trigger side effects such as outbound network access, file system interaction, or data exfiltration with the privileges of the Langflow backend process.

Severity
high
Software
Python
Fixed in
1.11.0
Published
2026-08-05

Affected versions

From: 1.0.0

Until: 1.11.0

Fixed in: 1.11.0

How to fix this CVE

Upgrade IBM Langflow OSS to version 1.11.0 or later to eliminate the code execution vulnerability in Agentic Assistant validation. The vulnerability allows authenticated users to trigger arbitrary Python code execution during the validation phase before user approval, potentially compromising backend systems and data. Immediately apply the patch and review any validation logs for suspicious activity.

sudo dnf upgrade python3-langflow || sudo pip3 install --upgrade langflow>=1.11.0

Defensia detects this vulnerability

How to check if you are affected

  1. Check installed Langflow version: pip3 show langflow | grep Version
  2. Verify vulnerability exposure: grep -r 'agentic_assistant\|validation' /path/to/langflow/config/ to confirm Agentic Assistant features are enabled
  3. Search backend logs for unauthorized code execution: grep -i 'exec\|eval\|subprocess' /var/log/langflow/*.log | grep -v '^#'
  4. Confirm patch installation: pip3 show langflow | grep Version and verify it reports 1.11.0 or higher

FAQ

What is CVE-2026-9196?

This vulnerability affects IBM Langflow OSS where the Agentic Assistant validation process executes Python code generated by language models before obtaining user approval, allowing authenticated attackers to run arbitrary code with backend process privileges.

Is CVE-2026-9196 being actively exploited?

No, this CVE is not currently listed in the CISA Known Exploited Vulnerabilities catalog and no public exploits are available, though the attack vector is network-accessible to authenticated users.

What versions of Langflow are affected by CVE-2026-9196?

IBM Langflow OSS versions 1.0.0 through 1.10.3 are vulnerable; version 1.11.0 and later contain the fix.

How do I check if my server is vulnerable to CVE-2026-9196?

Run 'pip3 show langflow | grep Version' — if the version is 1.10.3 or lower and Agentic Assistant features are enabled in your deployment, your system is vulnerable.

Does Defensia detect CVE-2026-9196?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Langflow is installed on a monitored server, CVE-2026-9196 will appear in your dashboard with remediation steps.

Related Python CVEs

CVE-2026-33054CVSS 10Mesop is a Python-based UI framework that allows users to build web applications. Versions 1.2.2 and below contain a Path Traversal vulnerability that allows any user supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation. This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds. This issue has been fixed in version 1.2.3.
CVE-2026-34938CVSS 10PraisonAI is a multi-agent teams system. Prior to version 1.5.90, execute_code() in praisonai-agents runs attacker-controlled Python inside a three-layer sandbox that can be fully bypassed by passing a str subclass with an overridden startswith() method to the _safe_getattr wrapper, achieving arbitrary OS command execution on the host. This issue has been patched in version 1.5.90.
CVE-2026-28505CVSS 10Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the str_eval() function in notification_handler.py implements a sandboxed eval() for notification text templates. The sandbox attempts to restrict callable names by inspecting code.co_names of the compiled code object. However, co_names only contains names from the outer code object. When a lambda expression is used, it creates a nested code object whose attribute accesses are stored in code.co_consts, NOT in code.co_names. The sandbox never inspects nested code objects. This issue has been patched in version 2.17.0.
CVE-2026-25632CVSS 10EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water distribution networks. Prior to 0.16.1, EPyT-Flow’s REST API parses attacker-controlled JSON request bodies using a custom deserializer (my_load_from_json) that supports a type field. When type is present, the deserializer dynamically imports an attacker-specified module/class and instantiates it with attacker-supplied arguments. This allows invoking dangerous classes such as subprocess.Popen, which can lead to OS command execution during JSON parsing. This also affects the loading of JSON files. This vulnerability is fixed in 0.16.1.
CVE-2025-54381CVSS 9.9BentoML is a Python library for building online serving systems optimized for AI apps and model inference. In versions 1.4.0 until 1.4.19, the file upload processing system contains an SSRF vulnerability that allows unauthenticated remote attackers to force the server to make arbitrary HTTP requests. The vulnerability stems from the multipart form data and JSON request handlers, which automatically download files from user-provided URLs without validating whether those URLs point to internal network addresses, cloud metadata endpoints, or other restricted resources. The documentation explicitly promotes this URL-based file upload feature, making it an intended design that exposes all deployed services to SSRF attacks by default. Version 1.4.19 contains a patch for the issue.

References

Track CVEs across your fleet automatically

Defensia scans your Linux servers and tells you exactly which ones are running vulnerable versions — including CVE-2026-9196. Free for 1 server.

Get started free