Intel

CVE-2026-13435

langflow: Improper Control of Generation of Code ('Code Injection') (CVE-2026-13435)

criticalEPSS 0.5%

Affected

  • langflow/langflow between 1.0.0..1.10.2

Description

IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.

Source: NVD (NIST)cvelistv5BSI WID PortalBSI CSAF

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

langflowlangflow
1.0.0 – 1.10.2

Metrics

XIEM Effective CVSS
9.9
Source: nvd-v3
EPSS percentile
43.0 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
critical
Priority score
87.98
Exploit maturity
no public PoC known
CVSS v3
9.9
EPSS score
0.5 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-07-30 16:48 UTC
CWE
CWE-94

Weakness classes (CWE)

  • CWE-94Base

    Improper Control of Generation of Code ('Code Injection')

    The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. Initial Analysis2026-08-04 20:15 UTC· nvd@nist.gov
    • CPE Configuration: OR *cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* versions from (including) 1.0.0 up to (excluding) 1.10.2
    • Reference Type: IBM Corporation: https://www.ibm.com/support/pages/node/7279987 Types: Vendor Advisory
  2. New CVE Received2026-07-30 19:17 UTC· psirt@us.ibm.com
    • Affected: Langflow OSS
    • Description: IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.
    • CVSS V3.1: AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    • CWE: CWE-94
  3. CVE Modified2026-07-30 19:17 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-13435","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…

Linked advisories