CVE-2026-66090 json
XML External Entity (XXE) Injection in Metadata Field Allows Arbitrary File Read
published 14d ago modified 13d ago also EUVD-2026-112566 , GHSA-668q-3hpr-6c96
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository openequella/openEQUELLA. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 7.1
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Apereo Foundation openEQUELLA 2026.1
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- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 14d ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Apereo Foundation openEQUELLA
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
github.com
/openequella/openEQUELLA/security/advisories/GHSA-668q-3hpr-6c96
vendor-advisory, advisory
-
openequella.github.io
/guides/
product
Sources
- CVE List CVE-2026-66090
- NVD CVE-2026-66090
- Maintainer advisory GHSA-668q-3hpr-6c96
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of openequella/openEQUELLA published their own advisory on GitHub. Reviewed sources take precedence over it.