Quick answers
- Is CVE-2026-3346 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-3346 being exploited in the wild.
- How severe is CVE-2026-3346?
- Medium severity, with a CVSS score of 6.4, published 30 April 2026.
- Which products and versions are affected?
- IBM Langflow Desktop 1.6.0 - 1.8.4.
- Is there a fix for CVE-2026-3346?
- 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-2026-3346 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-3346?
- 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 stored cross-site scripting (XSS) vulnerability exists in IBM Langflow Desktop versions 1.6.0 through 1.8.4. The flaw is located in the Markdown rendering pipeline, specifically due to the unsafe use of 'rehypeRaw' without proper sanitization during event-streaming in the Playground component. An authenticated attacker can inject arbitrary HTML or JavaScript code that executes in the context of other users' browsers. This can be leveraged to disclose sensitive credentials or perform account takeover. While the advisory mentions CWE-89 (SQL Injection), the descriptive text and title explicitly confirm this is a stored XSS vulnerability. Users should upgrade to version 1.9.0 or newer to resolve the issue.
Affected products
- IBM Langflow Desktop 1.6.0 - 1.8.4
Timeline
- 2026-04-28: disclosed: Initial publication by IBM
- 2026-04-30: advisory: NVD publication date