# CVE-2026-79723: IBM Langflow OSS server-side request forgery in API endpoint validation

Source: https://junglewise.ai/threats/cve-2026-79723-ibm-langflow-oss-server-side-request-forgery-in-api-endpoint  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-79723 · Severity: medium · CVSS 5 · Published 2026-09-10

IBM Langflow OSS is an open-source AI workflow platform that allows users to build and configure data pipelines and integrations. The platform fails to properly validate user-supplied API endpoint URLs, allowing authenticated attackers to trigger server-side requests to arbitrary internal or external targets. An attacker could exploit this to access sensitive information from internal networks, exfiltrate API credentials, or facilitate further network attacks.

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

## Quick answers

**Is CVE-2026-79723 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-79723 being exploited in the wild.

**How severe is CVE-2026-79723?** Medium severity, with a CVSS score of 5, published 10 September 2026.

**Which products and versions are affected?** IBM Langflow OSS 1.0.0 through 1.11.5.

**Is there a fix for CVE-2026-79723?** A patch was published on 2026-09-10: Version 1.11.6 addresses the vulnerability Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-79723 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-79723?** Check whether you run IBM Langflow OSS or Langflow 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

The vulnerability is a server-side request forgery (SSRF) flaw stemming from improper validation of user-controlled API endpoint URLs in multiple components, including the MCP server configuration, DataStax Astra DB connectors, IBM Db2 Vector Store connector, and OpenAI Chat Model components. Affected versions 1.0.0–1.11.5 pass these URLs directly to underlying SDKs without invoking the platform's connector SSRF validation guard. An authenticated attacker can supply URLs pointing to RFC 1918 addresses, loopback interfaces, or cloud metadata endpoints; some components (Db2, OpenAI) are also reachable via the unauthenticated public flow build endpoint, broadening the attack surface. Successful exploitation allows data exfiltration (including provider API keys) and internal network reconnaissance. The vulnerability was patched in version 1.11.6.

## Affected products

- IBM Langflow OSS 1.0.0 through 1.11.5

## Timeline

- 2026-09-10: disclosed
- 2026-09-10: patched: Version 1.11.6 addresses the vulnerability

## References

- [https://www.ibm.com/support/pages/node/7286665](https://www.ibm.com/support/pages/node/7286665)

## Related threats

- [IBM Langflow OSS path traversal arbitrary file read and write](https://junglewise.ai/threats/cve-2026-97677-ibm-langflow-oss-1-0-0-through-1-12-2-an-authenticated-flow)
- [IBM Langflow OSS authentication bypass](https://junglewise.ai/threats/cve-2026-93680-ibm-langflow-oss-1-0-0-through-1-12-8-could-allow-a-remote)
- [IBM Langflow OSS denial of service via resource exhaustion](https://junglewise.ai/threats/cve-2026-90991-ibm-langflow-oss-1-0-0-through-1-12-4-could-allow-a-remote)
- [IBM Langflow OSS path traversal arbitrary file overwrite](https://junglewise.ai/threats/cve-2026-77819-ibm-langflow-oss-1-0-0-through-1-12-3-could-allow-a-remote)
- [IBM Langflow OSS improper sanitization of secrets in exports](https://junglewise.ai/threats/cve-2026-77817-ibm-langflow-oss-1-0-0-through-1-12-4-could-allow-a-remote)