# CVE-2026-2310: IBM webMethods Integration Server XXE injection

Source: https://junglewise.ai/threats/cve-2026-2310-ibm-webmethods-integration-server-xxe-injection  
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-2026-2310 · Severity: high · CVSS 7.8 · Published 2026-09-10

IBM webMethods Integration Server is a middleware platform used to integrate business applications and data across enterprises. An XML external entity (XXE) injection vulnerability in version 11.1 allows remote attackers to extract sensitive data or exhaust server memory resources when the system processes malicious XML files, potentially compromising confidential business information or disrupting operations.

Technologies: [IBM webMethods Integration Server](https://junglewise.ai/threats/technologies/webmethods-integration-server). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-2310 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-2310 being exploited in the wild.

**How severe is CVE-2026-2310?** High severity, with a CVSS score of 7.8, published 10 September 2026.

**Which products and versions are affected?** IBM webMethods Integration Server 11.1.

**Is there a fix for CVE-2026-2310?** 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-2026-2310 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-2310?** Check whether you run IBM webMethods Integration Server 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

This is an XML external entity (XXE) injection vulnerability (CWE-91) in IBM webMethods Integration Server's XML processing functionality. The vulnerability allows a remote attacker to send specially crafted XML data that is processed by the server without proper validation of external entity declarations. By exploiting this, an attacker can read arbitrary files from the server, access internal network resources, or trigger denial-of-service conditions through billion laughs or similar XML expansion attacks. The CVSS 3.1 vector indicates local attack vector with low attack complexity and low privileges required. Patches are available via IBM webMethods Update Manager (Core Fix 14 or later for version 11.1).

## Affected products

- IBM webMethods Integration Server 11.1

## Timeline

- 2026-09-08: disclosed

## References

- [https://www.ibm.com/support/pages/node/7286620](https://www.ibm.com/support/pages/node/7286620)

## Related threats

- [IBM webMethods Integration Server authentication bypass in 2FA](https://junglewise.ai/threats/cve-2026-118904-ibm-webmethods-integration-server-12-1-could-allow-a-remote)
- [IBM webMethods Integration Server authentication bypass](https://junglewise.ai/threats/cve-2026-117545-ibm-webmethods-integration-server-12-1-could-allow-a-remote)
- [IBM webMethods Integration remote code execution in WmServiceMock](https://junglewise.ai/threats/cve-2026-12118-ibm-webmethods-integration-remote-code-execution-in-wmservicemock)
- [IBM webMethods Integration Server SSRF in Add Subscriber page](https://junglewise.ai/threats/cve-2025-14290-ibm-webmethods-integration-server-ssrf-in-add-subscriber-page)