---
title: "CVE-2026-10561: Langflow: PythonREPLComponent executes unsandboxed Python code, enabling authenticated RCE and privilege escalation"
url: https://erroneo.us/security/cve/CVE-2026-10561/
description: "CVE-2026-10561 (langflow (PyPI)): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-22
date_modified: 2026-10-08
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-10561"
kev: false
cvss: 10
epss: 0.0082
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-10561: Langflow: PythonREPLComponent executes unsandboxed Python code, enabling authenticated RCE and privilege escalation

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.8% , percentile 57: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 57% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes langflow (PyPI) < 1.10.1, fixed in 1.10.1 . Check your lockfile, including transitive dependencies.

## What it is

IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise

## Affected packages

- PyPI `langflow` < 1.10.1 → fixed: 1.10.1

## Affected products (CVE record)

- IBM Langflow OSS: 1.0.0 <= 1.9.3

## Severity

- ibm CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.82% probability of exploitation activity in the next 30 days; percentile 57.

## Sources

- [ibm.com](https://www.ibm.com/support/pages/node/7277242)
- [GitHub Advisory GHSA-8qpj-27x8-pwpq](https://github.com/advisories/GHSA-8qpj-27x8-pwpq)
- [CVE.org record CVE-2026-10561](https://www.cve.org/CVERecord?id=CVE-2026-10561)
- [NVD entry CVE-2026-10561](https://nvd.nist.gov/vuln/detail/CVE-2026-10561)
- [github.com](https://github.com/langflow-ai/langflow/security/advisories/GHSA-8qpj-27x8-pwpq)
- [github.com](https://github.com/langflow-ai/langflow/pull/13700)
- [github.com](https://github.com/langflow-ai/langflow/commit/2754c84aad1306f463db1c3bbb3e8ffbe85da77d)
- [github.com](https://github.com/langflow-ai/langflow/releases/tag/v1.10.1)

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Source page: https://erroneo.us/security/cve/CVE-2026-10561/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt