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Fencer Intel
critical 10.0

CVE-2026-10561 json

Unauthenticated Remote Code Execution in Langflow OSS PythonREPLComponent via Builtins Injection

published 4mo ago modified 15d ago also GHSA-8qpj-27x8-pwpq , PYSEC-2026-4231 , EUVD-2026-38245

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

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

Patch / fix

  • pypi langflow 1.10.1

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
GitHub 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
OSV 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi langflow
<1.10.1
1.10.1

Affected products

  • IBM Langflow OSS

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code
  • CWE-266 Incorrect Privilege Assignment
  • CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.