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

Quick assessment

Affected
Apereo Foundation openEQUELLA
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 openEQUELLA 2026.1 版本之前，SOAP API 在解析 操作中提供的 XML 数据时，使用了可解析外部实体的解析器。这允许攻击者读取 openEQUELLA 服务可访问的任意文件，或诱使服务器向攻击者指定的位置发起请求（即服务器端请求伪造，SSRF）。

CVSS 6.1 · Medium
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I. Basic Information for CVE-2026-66089

Vulnerability Information
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Vulnerability Title
XML External Entity (XXE) Vulnerability in SOAP Interface Allows External Entity Expansion
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apereo Foundation openEQUELLA 0 ~ 2026.1 -

II. Public POCs for CVE-2026-66089

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III. Intelligence Information for CVE-2026-66089

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Vendor Advisories for CVE-2026-66089 (1)

Security Blog Posts for CVE-2026-66089 (1)

Same Patch Batch · Apereo Foundation · 2026-10-29 · 6 CVEs total

CVE-2026-66088 9.4 CRITICAL Unrestricted Command Execution via system.execute
CVE-2026-66090 7.1 HIGH XML External Entity (XXE) Injection in Metadata Field Allows Arbitrary File Read
CVE-2026-66091 6.9 MEDIUM Unauthenticated IDOR Enables Disclosure of Other Users’ last-known details
CVE-2026-66092 4.8 MEDIUM Stored XSS in pre-login notice via reachable legacy logon route
CVE-2026-16889 4.8 MEDIUM Stored XSS via Pre-Login Notice Image Upload Serves Attacker HTML from Application Origin

IV. Related Vulnerabilities

Same product: openEQUELLA
Same vendor: Apereo Foundation
Same weakness: CWE-611