# CVE-2026-18836: IBM API Connect server-side request forgery

Source: https://junglewise.ai/threats/cve-2026-18836-ibm-api-connect-10-0-8-0-through-10-0-8-12-and-12-1-0-0-through  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-07. Updated: 2026-11-07  
License: CC BY 4.0 with a link back

CVE-2026-18836 · Severity: critical · CVSS 9.3 · Published 2026-11-07

IBM API Connect is an API management platform that handles authentication, traffic routing, and security for enterprise APIs. A server-side request forgery vulnerability allows unauthenticated remote attackers to force the platform to make requests to arbitrary destinations and receive the responses, potentially exposing internal network resources and sensitive data that should not be accessible.

Technologies: [IBM API Connect](https://junglewise.ai/threats/technologies/api-connect). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-18836 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18836 being exploited in the wild.

**How severe is CVE-2026-18836?** Critical severity, with a CVSS score of 9.3, published 7 November 2026.

**Which products and versions are affected?** IBM API Connect 10.0.8.0 through 10.0.8.12, 12.1.0.0 through 12.1.1.2.

**Is there a fix for CVE-2026-18836?** 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-2026-18836 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-18836?** Check whether you run IBM API Connect 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) in API Connect that allows remote attackers without credentials to manipulate the platform into sending HTTP requests to internal or external destinations of the attacker's choosing and returning the response. The affected component insufficiently restricts or validates outbound request destinations, enabling access to internal network services and data exfiltration via network-accessible requests.

## Affected products

- IBM API Connect 10.0.8.0 through 10.0.8.12, 12.1.0.0 through 12.1.1.2

## Timeline

- 2026-11-07: disclosed

## References

- [https://www.ibm.com/support/pages/node/7295635](https://www.ibm.com/support/pages/node/7295635)
- [https://www.ibm.com/support/pages/node/7295637](https://www.ibm.com/support/pages/node/7295637)

## Related threats

- [IBM API Connect server-side request forgery](https://junglewise.ai/threats/cve-2026-75590-ibm-api-connect-12-1-0-0-through-12-1-1-2-could-allow-a-remote)
- [IBM API Connect missing authorization in index access](https://junglewise.ai/threats/cve-2026-19131-ibm-api-connect-12-1-0-0-through-12-1-1-2-could-allow-low)
- [IBM API Connect improper backup server certificate verification](https://junglewise.ai/threats/cve-2026-19129-ibm-api-connect-10-0-8-0-through-10-0-8-12-and-12-1-0-0-through)
- [IBM API Connect server-side request forgery via unauthorized request](https://junglewise.ai/threats/cve-2026-19128-ibm-api-connect-12-1-0-0-through-12-1-1-2-could-allow-an)
- [IBM API Connect weak cryptographic algorithms in authentication](https://junglewise.ai/threats/cve-2026-19126-ibm-api-connect-10-0-8-0-through-10-0-8-12-and-12-1-0-0-through)