CVE-2026-66091

Description

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.

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Weakness Type (CWE)

CWE-639 CWE-639

References

Other References

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

Frequently Asked Questions

What is CVE-2026-66091? +

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.

How do I check if I'm vulnerable to CVE-2026-66091? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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