# CVE-2026-3341: IBM Langflow Desktop SSRF via DNS Rebinding

Source: https://junglewise.ai/threats/cve-2026-3341-ibm-langflow-desktop-ssrf-via-dns-rebinding  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-11. Updated: 2026-06-11  
License: CC BY 4.0 with a link back

CVE-2026-3341 · Severity: medium · CVSS 5.4 · Published 2026-06-11

IBM Langflow Desktop, a tool used for building AI workflows, is vulnerable to a security flaw that allows authenticated users to bypass network restrictions. An attacker can trick the system into making unauthorized requests to internal services or cloud metadata endpoints that should be private. This could lead to the exposure of sensitive internal data or allow an attacker to map out the organization's private network.

Technologies: [IBM Langflow Desktop](https://junglewise.ai/threats/technologies/langflow-desktop). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-3341 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3341 being exploited in the wild.

**How severe is CVE-2026-3341?** Medium severity, with a CVSS score of 5.4, published 11 June 2026.

**Which products and versions are affected?** IBM Langflow Desktop 1.0.0 - 1.9.2.

**Is there a fix for CVE-2026-3341?** 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-2026-3341 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-3341?** 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

IBM Langflow Desktop (versions 1.0.0 through 1.9.2) contains a Time-of-Check to Time-of-Use (TOCTOU) vulnerability in its SSRF protection mechanism. The 'validate_url_for_ssrf()' function performs a DNS lookup to validate an IP, but the subsequent request via 'httpx.AsyncClient()' performs a second, independent lookup. An attacker can use a DNS rebinding attack with a TTL of 0 to provide a safe IP during validation and a private/local IP (such as 127.0.0.1 or cloud metadata IPs) during execution. While DNS pinning infrastructure exists in the codebase, it is not consistently applied across all code paths. This allows authenticated attackers to perform network enumeration or access internal services. The issue is resolved in version 1.9.3.

## Affected products

- IBM Langflow Desktop 1.0.0 - 1.9.2

## Timeline

- 2026-06-08: advisory: Initial publication by IBM
- 2026-06-11: disclosed: NVD publication date

## References

- [https://www.ibm.com/support/pages/node/7275444](https://www.ibm.com/support/pages/node/7275444)

## Related threats

- [IBM Langflow Desktop code injection in code validation endpoint](https://junglewise.ai/threats/cve-2026-6543-ibm-langflow-desktop-code-injection-in-code-validation-endpoint)
- [IBM Langflow Desktop path traversal in API v2 file upload](https://junglewise.ai/threats/cve-2026-3345-ibm-langflow-desktop-path-traversal-in-api-v2-file-upload)
- [IBM Langflow Desktop IDOR in image download endpoint](https://junglewise.ai/threats/cve-2026-4503-ibm-langflow-desktop-idor-in-image-download-endpoint)
- [IBM Langflow Desktop path traversal in v2 API](https://junglewise.ai/threats/cve-2026-4502-ibm-langflow-desktop-path-traversal-in-v2-api)
- [IBM Langflow Desktop stored XSS in Markdown rendering](https://junglewise.ai/threats/cve-2026-3346-ibm-langflow-desktop-stored-xss-in-markdown-rendering)