Is CVE-2026-4502 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-4502 being exploited in the wild.

How severe is CVE-2026-4502?

Medium severity, with a CVSS score of 6.5, published 30 April 2026.

Which products and versions are affected?

IBM Langflow Desktop 1.2.0 - 1.8.4.

Is there a fix for CVE-2026-4502?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-4502 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-4502?

Check whether you run IBM Langflow Desktop at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-4502: IBM Langflow Desktop path traversal in v2 API

CVE-2026-4502 · Severity: medium · CVSS 6.5 · Published 2026-04-30

IBM Langflow Desktop, a tool used for building AI applications, contains a security flaw in how it handles file uploads. An authorized user could exploit this to save malicious files to sensitive areas of the computer's operating system. This could lead to a complete system takeover or the execution of unauthorized commands, potentially compromising corporate data and AI workflows.

Technologies: IBM Langflow Desktop. Vendors: IBM.

Quick answers

Is CVE-2026-4502 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-4502 being exploited in the wild.
How severe is CVE-2026-4502?: Medium severity, with a CVSS score of 6.5, published 30 April 2026.
Which products and versions are affected?: IBM Langflow Desktop 1.2.0 - 1.8.4.
Is there a fix for CVE-2026-4502?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-4502 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-4502?: Check whether you run IBM Langflow Desktop at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A path traversal vulnerability (CWE-22) exists in the IBM Langflow Desktop v2 API, specifically within the POST /api/v2/files/ endpoint. The application fails to properly sanitize multipart upload filenames, allowing an authenticated attacker to use 'dot dot' (/../) sequences to escape the intended upload directory. By writing arbitrary files to sensitive locations on the host filesystem, an attacker can achieve remote code execution with the privileges of the backend service. This vulnerability reportedly bypasses previous protections implemented for CVE-2025-68478. Users are advised to upgrade to version 1.9.0 or newer.

Affected products

IBM Langflow Desktop 1.2.0 - 1.8.4

Timeline

2026-04-28: advisory: Initial publication by IBM
2026-04-30: disclosed: NVD publication date
2026-05-11: other: NIST initial analysis and CPE enrichment

References

https://www.ibm.com/support/pages/node/7271097

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