CVE-2026-66089 PUBLISHED

XML External Entity (XXE) Vulnerability in SOAP Interface Allows External Entity Expansion

Assigner: MON-CSIRT
Reserved: 24.07.2026 Published: 29.10.2026 Updated: 29.10.2026

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).

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 6.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	Low
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	Low	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Apereo Foundation
Product	openEQUELLA
Versions	Default: unaffected affected from 0 to 2026.1 (excl.) unaffected from 2026.1 to 2026.2 (incl.)

Solutions

Upgrade to the vendor recommended fixed versions

Credits

dr0v3r finder

References

Problem Types

CWE-611 Improper restriction of XML external entity reference CWE

Impacts

CAPEC-201 Serialized Data External Linking
CAPEC-250 XML Injection