TI-2026-82263 Aliases CVE-2026-66090 GHSA-555x-f7vj-p9qw

XML external entity injection in openEQUELLA allows file reads

LOW 31CWE-611Published 2026-10-29 · Updated 2026-10-29

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-611 and the CVSS impact.

Summary

openEQUELLA versions before 2026.1 are affected. The XML parser used for item metadata does not disable external entity resolution (CWE-611). A user with permission to create items (CREATE_ITEM) can make the server read arbitrary files accessible to the openEQUELLA service or make requests to attacker-specified locations, including cloud instance metadata services.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

In openEQUELLA before 2026.1, the XML parser used for item metadata does not disable external entity resolution. A user permitted to create items (CREATE_ITEM) can submit crafted XML to POST /api/item and cause the server to read arbitrary files accessible to the openEQUELLA service, or make requests to attacker-specified locations (SSRF), including cloud instance metadata services.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00269 19th percentileScored 2026-11-07

Fix Fixed openEQUELLA (Apereo Foundation): 2026.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apereo Foundation	openEQUELLA	before 2026.1	2026.1	Patch available	CNA

openEQUELLA VendorApereo Foundation Affected before 2026.1 Fixed in 2026.1 Patch available CNA

Remediation

Upgrade openEQUELLA to version 2026.1 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA openEQUELLA (Apereo Foundation) Fixed in 2026.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-29
Apereo Foundation openEQUELLA 2026.1
5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2026-82261 OS command injection in openEQUELLA via system.executePriority MEDIUM 44
- TI-2026-82264 Unauthenticated access to user details in openEQUELLAPriority LOW 37
- TI-2026-82262 XML external entity injection in openEQUELLA SOAP API lets attackers read filesPriority LOW 27
Show all 5 records →

Timeline

2026-10-29 Threatist record created from CVE-2026-66090
2026-10-29 CISA SSVC decision points changed
2026-10-29 Priority changed: MEDIUM → LOW
2026-10-29 Alias added: GHSA-555x-f7vj-p9qw

References

Advisory 1

https://github.com/openequella/openEQUELLA/security/advisories/GHSA-668q-3hpr-6c96

Other 1

https://openequella.github.io/guides/

TI-2026-47769 openEQUELLA < 2026.1.0 Authenticated RCE via Java Deserialization in HTTP Invoker CVSS 4.0HIGH 8.7
TI-2026-82261 OS command injection in openEQUELLA via system.execute CVSS 4.0CRITICAL 9.4
TI-2026-82264 Unauthenticated access to user details in openEQUELLA CVSS 4.0MEDIUM 6.9
TI-2026-82262 XML external entity injection in openEQUELLA SOAP API lets attackers read files CVSS 4.0MEDIUM 6.1
TI-2026-82265 Stored XSS in openEQUELLA pre-login notice via legacy logon page CVSS 4.0MEDIUM 4.8
TI-2026-82260 Stored XSS via pre-login notice image upload in openEQUELLA CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences