IBMCVE-2026-13435

IBM Langflow OSS: improper input validation

Critical9.9CVE-2026-13435 · Published Jul 30, 2026 · updated Aug 4, 2026

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

Affected versions

Package	Affected	Fixed in
Langflow OSS Product	>= 1.0.0, <= 1.10.1	No fix yet

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-94

More IBM advisories

Date	Advisory	Severity	Fixed in
Jul 30	IBM WebSphere Application Server: remote code execution High8.5Jul 30 CVE-2026-11536No fix yet	High8.5	No fix yet
Jul 30	IBM Langflow OSS: code injection Critical9.9Jul 30 CVE-2026-12946No fix yet	Critical9.9	No fix yet
Jul 30	UCD - IBM: information disclosure Medium4.3Jul 30 CVE-2026-10569No fix yet	Medium4.3	No fix yet
Jul 30	IBM Langflow OSS: attacker could access another user's private vector High8.1Jul 30 CVE-2026-13444No fix yet	High8.1	No fix yet
Jul 30	IBM Langflow OSS: path traversal High7.5Jul 30 CVE-2026-12942No fix yet	High7.5	No fix yet
Jul 30	IBM HMC: remote code execution Critical9.8Jul 30 CVE-2026-12943No fix yet	Critical9.8	No fix yet

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