CVE-2026-66091

UNKNOWN 0.0

Unauthenticated IDOR Enables Disclosure of Other Users’ last-known details

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

In openEQUELLA before 2026.1, the GET /api/userquery/userinfobackup endpoint performs no authentication or authorisation check. An unauthenticated attacker who supplies another user's uniqueId can retrieve that user's stored personal details (username, first name, last name and email address) within the same institution.

CWE	CWE-639
Vendor	apereo foundation
Product	openequella
Published	Oct 29, 2026
Last Updated	Oct 29, 2026

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Affected Versions

Apereo Foundation / openEQUELLA

2019.2 < 2026.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openequella/openEQUELLA/security/advisories/GHSA-mxj9-pmpw-j4xw openequella.github.io: https://openequella.github.io/guides/

Credits

dr0v3r